Hello everybody!
Solo'ed XT-002 yesterday, time for a small guide.
Video here:
YouTube - ‪Durendil vs Xt-002 Deconstructor‬‏
Now for the guide:
The trash mobs: the easiest way to deal with those is to get in aspect of the fox and kite them with trap/concussive shot while dpsing them. Usually killed them near the flame leviathan's corpse. The gnomes won't follow you after a while, but won't get out of combat either.
Now, the boss itself:
Positionning: near one of the piles, or you will have adds left, adds right, chaos everywhere.
two phase:
First phase (up phase):
Meelee: careful there, keep mend pet up
Searing light : dot, nearly 20000 damage in 9 sec, best moment to bandage is just after it expires.
gravity bomb : 12000 damage after 9 sec. If you need to bandage, you can do it as soon as the debuff appears, but not after it expires: a searing light will probably follow soon. Blessing of forgotten kings helps reduce the damage.
You will never get two debuffs at the same time.
Tympanic tantrum: this is the ability that makes this combat hard (even if it will probably be easier with T12, see below). 80% of your life in 8 seconds. It hurts. Basically, the fight is surviving the tantrums.
Use defensive CDs at all costs: Stoneform for dwarves (-10%), Roar of sacrifice (pet talent) (-20%). Engineers have a shield that absorbs 18000 damage (5 minutes CD, probably usable only once a battle). And don't forget your Mythical healing Potion: it's a 20K heal.
There are two ways to bandage after the tantrum: wait for a searing light or, if he cast searing light just before his tantrum, bandage as soon as the tantrum ends.
The first tantrum happens about 30 seconds after the pull, or after he gets up from a heart phase. Then it has a 1 minute CD.
Second phase (75, 50, 25%), also called heart phase:
Exposed heart: exactly like Magmaw's head: + 100% damage taken for 30 seconds. You really want to tear it apart. Use a rapid fire to increase your dps.
Adds:
Srapbots: 50K heal for XT. Bad robots. You can either kill them, or use boombots. In my video, you can see i messed up in the end, and XT got 500K back: as such, I killed him seconds before he would have cast a fatal tantrum.
Boombots: AoE when they die. Use them to kill scrapbots.
Add - bots (pummelers): Trap them, or pull then FD (makes them reset).
Don't deal with adds until he gets up. You can bandage immediatly, but it doesn't always work. Then destroy all scrapbots.
As such, there are two ways to beat him: the normal dps way if, like me, you haven't got an heroic raid (or T12 when it gets available) item level. In this case, your aim is simple: heal yourself, bandage even in heart phases if it's off CD, and eat 4 tantrums. The only dps requirement is this one: Never, ever, ever, get two tantrums in the same up phase. It's a guaranteed wipe.
When he gets up, kill or reset all the adds. Then eat a tantrum, and get him in heart phase before his next tantrum. He should fall if you self-heal yourself enough.
The second strategy i would give would be, if you have enough gear (372, maybe T12), to hit the heart so fast (maybe by using two rapid fires in a row), that he hasn't time to cast his tantrum. Just remember: if the heart is down and scrapbots are up, kill the srapbots first. That way, you can have only 3 tantrums, or 2, or 1: all depends on your dps.
In an ideal world, you would put XT at 1% of his next heart phase, kill the adds, and get that last % before 30 seconds expire.
A last thing: endurance buff is nearly useless: you will take a bit more damage from tantrums, and chimera shot will nearly make up for it - if you sometimes find yourself at 5K health, don't use it. However, The 4% stats buff is useful because of the shadow resistance, and endurance buffs help you keep your pet alive.
Hopes it helps, pray for a lot of luck with Chimera shots crit heals if you want to try him.