Nerf Scrapbots

This is an extreme RNG achievement, so prepare to spend a lot of time attempting this, as there are numerous factors that come into play. Firstly if you're soloing, you will need to position the boss correctly (example: close to the left end of the staircase where the boss is) and hope for a good spawn pattern, as well as 4x spawns of Scrapbots instead of the Junkbot. Then you need to carefully kite the boss in order to line up the Scrapbots close to the Boombots so that they will explode when the Boombot detonates. It's suggested to attempt this on a class that can reset the boss (hunter, rogue), as you will probably need a lot of those.

Did this May 13 2020
You can safely kill all the trash inside the boss room

For this achievement we were 4, but i think we could have managed to do it as 3. We had one lvl 110 to tank the boss at the north west pile of scraps while facing the boss towards the room. She got the boss down to less than 50% (more than 40%). She stripped and only had her weapons. The rest of us were lvl 120, one rogue, one windwalker monk and one balance druid. The druid rooted the mobs and monk used ring of peace to get the mobs closer together.

We tried to get the boombots to explode at the boss and kill the scrapbots there, but failed multiple times. Then, by accidentally single target and kill one of the boombots, we found out that the explosion from the boombots killed the scrapbots and counted towards the achievement. So what we did was rooting and stunning the scrapbots and boombots until we had enough scrapbots, and then we just spread out and single targeted the boombots so they killed the scrapbots.

You get the achievement before you kill the boss, so if you fail then you can just reset it by vanishing or feigning death. When we tracked the achievement, it started the timer when the first scrapbot was killed.

Note: Only the one tanking the boss has to vanish/feign death to reset unless you use abilities like ox statue for brewmaster monk or someone else aggroes the boss. The ox statue didnt taunt the bots, so its no point in using since it prevents the reset of the boss (the boss goes for the statue when the one damaging it vanishes). We did reset when using the staute by having the monk HS out.
Note2: With this method we experienced that the bots would just continue spawning, so when we had Pummelers spawn it didnt really have an impact on the fight. You can either ignore them or kill them.

Just got this on a 70 Frost Mage after trying a bunch of different strategies on a lot of different classes.

Engaging the boss with Counterspell and pulling to the north-western junk pile. Then, a Water Elemental's Waterbolt usually gets XT-002 to just above 50% and one melee swing with a 2h staff would knock him further below 50% triggering two heartbreak phases back-to-back.

Snaring the first round of scrapbots with a combination of Water Elemental's Freeze and Slow + Mass Slow was able to buy enough time that no scrapbots were destroyed until the 2nd heartbreak phase was over. At that point all I needed to do was kite the boss toward the rest of the oncoming scrapbots.

If anything goes wrong it's easy to reset the fight with Greater Invisibility.

Good luck!