Blood Queen will always bite the top threat except the MT. This makes it fairly easy to control who gets bitten if you want. If you don't want to bother with this it should be plenty enough to get the first player bite. On our attempts the late stages of the fight were very chaotic and we had quite a few people mind controlled or dead when she finally died. Unless you're very confident you're probably not gonna want to waste any tries, so make sure to keep the player alive.
I'm pretty sure this is incorrect. The threat mechanics of the random bite seem to match that of the Eredar Twins Shadowfury/Conflagrate in Sunwell (minus the cross-over). Lana'thel appears to pick (at random) anyone from the top 1-5 of her threat list, ignoring her current target of course.
We tested this a bit lastnight in our Alt raid, intentionally controlling and recording each pull to predict the first Bite target - disproving the "always #2 threat target" theory and confirming that she certainly never roams beyond the top #5 threat targets.
I'm planning to go to Onyxia for some testing. I want to see if I can strafe into a breath and back without getting hit by a cleave. The cleave timing from Onyxia is the interesting point, since she should basically work like Sindragosa.
For those still needing to farm souls but clear the instance early so you can't get into the rep farm groups, the giest traps in the plague wing reset even if Putricide is dead. I just went in with four people in both 10 and 25 and got an extra 20 or so souls for each of them including the 10 man val'kyrs.
Crunched some quick numbers to see how long we can expect to farm shards after completing the infusions, there seems to be a giant difference depending on how quick your guild is going to attempt hardmodes.
Drop rate between 25-49% depending on boss, this averages to a 37% drop rate amongst all 12 bosses. 37% chance for a shard drop to occur, and 12 chances. Average shards per run = ~~4.5 (4.44)
50 Shards required, 4.5 per week = 11 weeks of clearing the instance on normal mode.
50-100 drop rate, average drop rate of 75% amongst all 12 bosses. Average shards per run = 9
50 Shards required, 9 per week = 5.5 weeks of clearing on full hardmode.
Most of us are probably somewhere in the middle, so I'd estimate on average it will take two months of farming to receive the shards. The second person in your guild will likely get shadowmourne in less weeks than the first, however, due to the nature of progression and the higher drop rate on hardmode encounters.
I completed the Blood Infusion quest tonight, it is extremely easy compared to the Putricide quest. All you need to do is:
1. On the pull, the person on the quest runs in as if they are the health blob offtank. Once you take 1 tick of Blood Mirror damage, run away until it stops targeting you and chooses the actual offtank. Just watch your debuffs for "Gushing Wound", and run away once you get this debuff.
2. Make sure that whoever gets the "random" first bite, chooses to bite the person on the quest first.
From this point on, all you have to do is beat the fight normally, since you will have to bite 3 people before the fight ends. The Gushing Wound DoT is barely noticeable since you heal yourself for so much damage while you are a vampire - the only time it matters at all is while she is airborne