Health:

• Normal:  5,250,000
• Heroic:  25,000,000
• 10 Minute Enrage

Abilities:

• Tympanic Tantrum:  Deals 10% damage every 1 sec for 12 sec. Nearby enemies are also dazed for the duration. 2 sec cast / Channeled
• Light Bomb:  Charges the target with divine energy, causing them to sear nearby allies for 9 sec.
• Gravity Bomb:  Charges the target with dark energy, causing them to explode and pull in nearby allies after 9 sec.  (Pulls enemies within 10 yards into a gravity well, dealing 19000 to 21000 damage. Instant)

Adds:

• XM-024 Pummellers: melee fighter adds and use Arcing Smash, Uppercut, and Trample
• The XS-013 Scrapbots:  runs to XT-002 Deconstructor to repair it. If they manage to reach it XT-002 will consume them and regain health.
• XE-321 Boombots:  explode and deal damage to anyone within 20 yards, including NPCs.

Hard Mode:

To activate hard mode, destroy the exposed heart during a phase change and he restores to max health and gains the following abilities:

• Heartbreak:  The heart of the XT-002 Deconstructor has been severed, removing the combat limitations of the XT-002 Deconstructor. Damage increased by 30%. Health increased by 40%.
• Void Zone:  Summon a Void Zone that deals 7500 Shadow damage to enemies that stand within it. This is spawned by Gravity Bomb.
• Life Spark:  Light Bomb also spawns an add called Life Spark. This add will repeatedly cast Static Charge - Deals Nature damage to all enemies within 500 yards every 3 sec.

The Fight:

A mostly tank and spank with adds coming out type of fight.   He does Tympanic Tantrum which is like a thunderclap or Void Reaver's pound.   He makes people into bombs, so the ranged would be best be stacked together so the bomb guy can run out before killing the raid.

Every 25% (75%, 50%, 25% of total hp), he stops and adds come out.   Scrapbots will heal him if they reach him, so kill those asap.   Boombots blow up at 50% health damaging everything around them including other adds, so they can be used to help.   Pummellers must be offtanked, and taken care of after all the Scrapbots are dealt with.

Repeat.

Ok more details.  The boss is tanked in the back near the stairs.  The raid should spread out.  AoE healing is less effective, but AoE damage is also reduced.  

During add phase, the Heart is exposed for 30 seconds.   Every damage done to it will transfer to XT-002, and it is also vulnerable taking double damage.    This is significant in helping with the enrage timer.   The adds have a little lag time before they appear from the scrap piles from the 4 corners of the room.   Just make sure not to kill the heart, stop at 10-20% or so.  

After the heart phase, be sure to kill the remaining Scrapbots, utilizing the Bomb bots when you can.   Also for the Pummelers, we just let splash damage finish them off.   Though be careful they do cleave around melee, not lethal one-shot cleaves, but still hits hard.

For hard mode, during the add phase, destroy his heart.  This will reset his health, well actually increasing it too, along with damage.   You can do it in any of the add phase, but since it's the same hard mode loot in any of them too, it's best to do it early.

Added lethal abilties are Void Zones and a Life Spark add from the bombs for more aoe damage all around.

After destroying the heart, clean up the adds, there will be no more heart phases so no more bots coming, just straight dps.   Work out a system for the Gravity Bomb and Light Bombs.   We had Gravity Bombs go left, dropping off Void Zones there.     Light Bombs go right, and towards the tank, so the Life Spark can be closer to him to be pulled off.   Ranged will switch to dps it down.   Rinse and Repeat.

Achievements:

Nerf Engineering:  Defeat XT-002 Deconstructor without him recovering any health from XS-013 Scrapbots on Normal/Heroic Difficulty.

Simple task to do.   Just need to make sure of it.

Nerf Scrapbots:  Defeat 20 XS-013 Scrapbots within 12 seconds using XE-321 Boombots on Normal/Heroic Difficulty.

This may need a bit of a trick since these bots aren't tankable and only move towards the boss I believe.   So I'd imagine we'd have to tank in the middle, furthest from all 4 piles.   And simultaneously work on 4 boombots on each pile and get em to blow up the scrapbots within those 12 seconds.

Nerf Gravity Bombs:  Defeat XT-002 Deconstructor without any raid member dying from a Gravity Bomb on Normal/Heroic Difficulty.

Raid check, another simple one.

Must Deconstruct Faster:  Defeat XT-002 Deconstructor in 205 seconds on Normal/Heroic Difficulty.

Simple again in theory.  Probably just more gear, less healers, etc, etc.

Heartbreaker:  Defeat XT-002 Deconstructor after destroying his heart on Normal/Heroic Difficulty.

Hard Mode.  Well the fight resets with more damage more health, but not the timer though.   Most part the fight is the same, cept Gravity Bombs leave Void Zones to not stand in.   Light Bombs leaves a Spark add that does more damage.

Trash Info:

The 2 packs on either side have been brought back.   They were gone for a week due to a bug making them both linked.    Anyways, you'll find 3 tech gnomes, and a bunch of bots.    They bots themselves cleave and stuff, can hit hard, also one of them throws Sawblades up which are killable (14K hp) or they can rape the raid.

The tech gnomes are what to focus on first.   They can cast a shield that will heal them while in it, and reduces damage done to them by 90%.   So gotta interrupt those casts.   Or if they get it off, drag them out of the shields, they're big and yellow, can't miss them.

After that, most of the threat is gone, and the rest can be burned down.

Sources:

• http://www.mmo-champion.com/index.php?page=841
• http://www.stratfu.com/strats/XT002
• http://www.wowwiki.com/XT-002_Deconstructor