Phase 1: Main phase

There are two strategy choices: Spread out or clump up.

Either way your goal is the same: minimize the number of people hit by Light Bomb (5 yard radius) while not dying to Tympanic Tantrum.

And never hit anyone with Gravity Bomb.

Spread out

This is simple: spread at least 5 yards out and you won't need to worry about moving when you get Light Bomb. 10 yards will get you Gravity Bomb.

Your healers will need to be able to top off everyone during Tympanic Tantrum however, without the benefit of AE spells. Since this does 120% of the raid's health and people may be low from other damage, heals need to be fast and consistent.

This strategy has the advantage that there is far less raid movement, meaning heals and DPS can be more consistent.

Clump up

We chose three clumps: Two ranged clumps to his back left and back right, melee behind him.

When you get a bomb, you move out. Ranged move back if they can so they don't crowd the melee.

The danger of this strategy, however, is that while group heals are more effective, more people take damage (since Light Bomb starts ticking immediately) and Light Bomb during Tympanic Tantrum is very dangerous since Tympanic Tantrum snares you.

Holy priests with the +60% run speed talent on Power Word: Shield, Body and Soul, are excellent for this fight: don't bother shielding people with Gravity Bomb, since they have a full nine seconds to move. The danger lies with Light Bomb, where a speed boost is most welcome.

Having killed him that way though, we suspect spreading out may be a better strategy on the whole.

Phase 2: Exposed Heart

Every 25% he will switch to Phase 2.

When the heart is exposed, start DPS'ing it -- don't kill it, however, since that activates the hard mode. All damage done to the heart is increased by 100%, however, and when he ends Phase 2 his health drops by as much damage as you did to his heart.

The Pummelers need to be tanked immediately.

The Bomb Bots will do damage to friendlies and enemies when they explode.

The Scrap Bots must be AE'd before they get close enough to XT-002 to heal him.

If you're having problems reaching the enrage timer, don't DPS the Pummelers: bring them to exploding bomb bots, and then just keep them near the boss so they pick up incidental AE (although be careful of their frontal AE, don't wipe out the melee.)