We were able to down it tonight; we had 6 dps, 1 healer and 1 tank... It's a really heavy DPS gear check.
It's really not. It's just a mistake check.
You should never have a case when your dps is not killing a munitions droid, one needs to spawn right as the previous one dies. You can soak all the assassin droids and never have to kill any of them. In 16 man we've finished 4x with over a minute left, when we did the PTS with 8 we had about 30s left on enrage after 4x droid/disarm. It's all about flow. We used 2 tanks, 2 heals, 6 dps in our 8.