I never thought I'd have to do that, but let's be honest - this fight is really one of those that doesn't have a 'go-to' tactic or a simple fix for every problem.
First I'll list our group comp:
Tanks: BDK, Paladin
Healers: Druid, Paladin
DPS: Elem, Frost mage, Hunter, Warlock, Rogue, Spriest
So, our main strat currently is killing mines whenever possible. The worst part comes at wave 3. We have empowered laser 'rings of fire' from wave 2, and wave 3 itself is the empowered magnet. During those hellish ~20-30 seconds of
- Room full of previous empowered laser fire
- Non-empowered rockets going off
- People kiting the new non-empowered lasers
- People still having to evade new sawblades
- Empowered magnet sawblades flying everywhere
we tend to lose at least 2-3 people. We're usually at ~60-65% during that moment. Once we managed to lose only 1 DPS and died later at ~40%, don't really remember why.
When we tried dealing with empowered mines, we had a hard time whenever our ranged DPS had to kite lasers during the active empowered mines - other DPS couldn't bring enough CC and/or fast damage.
So basically I look at it now and see that most of our problems come from lasers. Any lasers, be it normal or empowered ones. Rockets (both empowered and normal) seem piss easy, at least from my perspective. I MIGHT be wrong in believing that, and if we decide to kill lasers we'll have an even harder time. We're currently at ~120 wipes and, as you can see, nowhere near success.
If anyone had a similar experience and might share some advice, it would be MOST welcome!
Thanks in advance.