This thread is to discuss the Rotface encounter in Icecrown Citadel. It's my understanding based on http://elitistjerks.com/f15/t83571-icecrown_posting_guidelines_updated_8_dec_09_a/ that there are no bans on any 3.3 content discussion. I used to really enjoy reading the boss-specific threads on these forums and look forward to seeing them again, so I am starting this one.

Rotface

We successfully downed Rotface this week and I will make attempts to update this post with the valuable points from this thread.

• The little oozes have a 'fixate' on whoever drops them - this means everyone who gets the Mutated Infection debuff is 'responsible' for making sure their ooze merges properly, kiting their small ooze if needed.
• The little oozes are snarable (Chains of Ice) and possibly rootable but are NOT tauntable - see fixate above.
• You can have multipe large oozes at one time - avoiding mulitple large oozes is one of the keys to fight
• There is no 'hard' enrage. Rotface casts Mutated Infection starting every 12 seconds and ramping up to every ~6 seconds, regardless of health. For this reason, it is recommended to bloodlust at the start of the fight. The goal is to shorten the total fight length.
• Paladins and DKs seem to be the optimal kite tanks. Paladins have range snap agro (avenger's shield, judegement) and can control the cleanse, which can be very useful. DKs also have decent ranged threat (D&D, DC, IT) and can freely run through the slime while kiting through AMS/IBF usage.
• The kiting tank should avoid kiting the large ooze anywhere near the raid. Try to keep it on the outside of the room.
• The kiting tank should not be afraid to run through the large quandrant slime. It's better to heal that damage on a tank than to kite the large ooze near the raid.
• The kiting tank should never be meleed by the large ooze. It is the people with the little slime's job to properly kite their little slimes to merge with the big slime.
• As the Rotface begins casting mutated infection more rapidly, it is everyone's job to be aware and properly drop their oozes - avoid tunnel vision dps when Rotface is at 20% - properly positioning the little oozes is still the priority for everyone.
• Unstable Ooze Explosion - the mechanic is straightforward. The big ooze begins casting (~1.5-2 cast) and the missiles don't target anyone until after the cast is finished. Have your kiting tank call out when the casting ends for people to run away from Rotface and let the missiles land.

We attempted the achievement last night and one of the strats we tried was to have multiple large oozes to collect the smaller ones. At one point we had two large oozes, both with a 2-stack merge to form an ooze with a 4-stack. At higher stack levels you my get a different result but at that level they will do nothing different.

Large Oozes will still blow up at larger than 5 stacks.
We had a 5 stack that bugged out and didn't blow up. When it got the 6th stack it decided to blow up.

Are you sure the soft enrage is at 30% vs on a timer?

It seemed to us that it was a continuous increase over the fight - the rate just went up. As a result we ended up burning heroism at about 97% to take full advantage of the limited movement required at the start.

If it turns out to be a 30% enrage that certainly significantly changes when we burn hero. (We killed him but I'd still love to make him easier)

It appears to be a speed up over time, and not at 30%.

Here's a full log from our kill:
[20:55:06.809] Wiggzie afflicted by Mutated Infection from Rotface
[20:55:18.867] Wiggzie's Mutated Infection fades
[20:55:21.192] Razorwind afflicted by Mutated Infection from Rotface
[20:55:28.368] Razorwind's Mutated Infection fades
[20:55:35.113] Nightside afflicted by Mutated Infection from Rotface
[20:55:47.091] Nightside's Mutated Infection fades
[20:55:55.802] Fellhoof afflicted by Mutated Infection from Rotface
[20:56:07.823] Fellhoof's Mutated Infection fades
[20:56:08.554] Fellhoof afflicted by Mutated Infection from Rotface
[20:56:19.818] Vezi afflicted by Mutated Infection from Rotface
[20:56:20.623] Fellhoof's Mutated Infection fades
[20:56:31.907] Andeh afflicted by Mutated Infection from Rotface
[20:56:31.907] Vezi's Mutated Infection fades
[20:56:43.890] Andeh's Mutated Infection fades
[20:56:49.036] Vividica afflicted by Mutated Infection from Rotface
[20:56:52.024] Vividica's Mutated Infection fades
[20:56:58.724] Woes afflicted by Mutated Infection from Rotface
[20:57:08.835] Stabmix afflicted by Mutated Infection from Rotface
[20:57:10.878] Woes's Mutated Infection fades
[20:57:14.277] Stabmix's Mutated Infection fades
[20:57:18.942] Deyus afflicted by Mutated Infection from Rotface
[20:57:30.866] Deyus's Mutated Infection fades
[20:57:30.973] Andeh afflicted by Mutated Infection from Rotface
[20:57:38.969] Stabmix afflicted by Mutated Infection from Rotface
[20:57:40.651] Andeh's Mutated Infection fades
[20:57:46.944] Woes afflicted by Mutated Infection from Rotface
[20:57:50.998] Stabmix's Mutated Infection fades
[20:57:54.967] Aerivore afflicted by Mutated Infection from Rotface
[20:57:58.987] Woes's Mutated Infection fades
[20:58:03.433] Whippedkreme afflicted by Mutated Infection from Rotface
[20:58:05.933] Aerivore's Mutated Infection fades
[20:58:10.828] Wiggzie afflicted by Mutated Infection from Rotface
[20:58:15.454] Whippedkreme's Mutated Infection fades
[20:58:19.456] Aerivore afflicted by Mutated Infection from Rotface
[20:58:22.822] Wiggzie's Mutated Infection fades
[20:58:25.032] Aydin afflicted by Mutated Infection from Rotface
[20:58:31.217] Stormseer afflicted by Mutated Infection from Rotface
[20:58:31.419] Aerivore's Mutated Infection fades
[20:58:37.288] Aydin's Mutated Infection fades
[20:58:38.159] Justice afflicted by Mutated Infection from Rotface
[20:58:43.205] Stormseer's Mutated Infection fades
[20:58:43.525] Nightside afflicted by Mutated Infection from Rotface
[20:58:49.235] Woes afflicted by Mutated Infection from Rotface
[20:58:50.147] Justice's Mutated Infection fades
[20:58:55.466] Coptic afflicted by Mutated Infection from Rotface
[20:58:55.538] Nightside's Mutated Infection fades
[20:59:01.247] Fellhoof afflicted by Mutated Infection from Rotface
[20:59:01.247] Woes's Mutated Infection fades
[20:59:07.022] Uppercut afflicted by Mutated Infection from Rotface
[20:59:07.441] Coptic's Mutated Infection fades
[20:59:10.304] Fellhoof's Mutated Infection fades
[20:59:13.771] Razorwind afflicted by Mutated Infection from Rotface
[20:59:19.064] Uppercut's Mutated Infection fades
[20:59:19.099] Vezi afflicted by Mutated Infection from Rotface
[20:59:24.148] Vezi's Mutated Infection fades
[20:59:25.126] Aerivore afflicted by Mutated Infection from Rotface
[20:59:25.765] Razorwind's Mutated Infection fades
[20:59:31.098] Deyus afflicted by Mutated Infection from Rotface
[20:59:37.118] Aerivore's Mutated Infection fades
[20:59:37.713] Sylnir afflicted by Mutated Infection from Rotface
[20:59:43.101] Deyus's Mutated Infection fades
[20:59:43.741] Sylnir's Mutated Infection fades
[20:59:43.741] Stabmix afflicted by Mutated Infection from Rotface
[20:59:49.140] Andeh afflicted by Mutated Infection from Rotface
[20:59:51.983] Stabmix's Mutated Infection fades
[20:59:55.206] Andeh's Mutated Infection is refreshed by Rotface
[20:59:55.517] Andeh's Mutated Infection fades
[21:00:01.279] Aydin afflicted by Mutated Infection from Rotface
[21:00:07.095] Aerivore afflicted by Mutated Infection from Rotface
[21:00:12.182] Aerivore's Mutated Infection fades
[21:00:13.179] Stormseer afflicted by Mutated Infection from Rotface
[21:00:13.338] Aydin's Mutated Infection fades
[21:00:18.194] Stormseer's Mutated Infection fades
[21:00:25.246] Deyus afflicted by Mutated Infection from Rotface
[21:00:31.169] Coptic afflicted by Mutated Infection from Rotface
[21:00:37.198] Deyus's Mutated Infection fades
[21:00:37.281] Aydin afflicted by Mutated Infection from Rotface
[21:00:43.214] Coptic's Mutated Infection fades
[21:00:49.305] Aydin's Mutated Infection fades

It starts at 12 seconds and decreases to what looks like 6 seconds towards the end.

This is a relatively important point for Bloodlust usage. It means you can Bloodlust at the start of fight instead of saving it for the 'enrage' phase, allowing better use of personal cooldowns.

Popping Lust/Heroism on engage seems like the clear choice, yes, since the theoretical benefits of execute-range DPS are going to be far outweighed by the fact that you have a third of your DPS running out for debuffs and/or kiting slimes at that point.

Looks like it accelerates steadily up to a point, then stabilizes.
Peaks in the graph look like they could be "missed" casts possibly due to some alternate thing taking place?

Aye, this is exactly what we were doing (I was the pally tank). Immediately following the Unstable Ooze Explosion, we sometimes fell behind on the oozes (having multiple running amok while they tried to combine into the Big Ooze), but once the Big Ooze was up we typically got back in the routine. We began cleansing as soon as the debuffed players were out of the raid enroute to me, leaving the responsibility of combining the oozes to that player, leaving the kiter to focus on avoiding puddles and getting cornered.

Interesting information about the soft enrage - BL at the start would seem to yield the most benefit.

When we were doing this last night we noticed that when two big oozes merged they didn't in fact create a bigger ooze, but cancelled each other out and disappeared. It's entirely likely that this is just a bug and since we were more concerned about getting the kill down we didn't pursue the strat for the achievement last night.

We tested last night (around 18 hours ago) and definitely had 2 merge and cancel. I am unsure of the stack count though. I have trouble believing that it's not an intended mechanic to deal with them due to the achievement;

Dances with Oozes (10 player)
Defeat Rotface without a Big Ooze casting Unstable Ooze Explosion in 10-player mode.

If you can't combine them to kill them off I'm not sure how else you could do it since they have fairly high HPs don't they?