Something is very wrong now with DarkSide 7D

I was going back and 3 starring all the missions I missed now that all my 5 dark side toons are maxed and all gear lvl 7. This was my first post update mission. I was playing Darkside 7D. Things were going fine until 3/3.. well not really fine but going. All my characters were full or near full health except Talia who had just healed. Protection had been taken down. Kit did his AOL on his first try and killed EVERYONE in one hit on my entire team!? What am I suppose to do about that?

Lead is Ventress, Daka, GS, Opress, Talia. All 7 star gear level 7.

I tried subbing in Dooku for Talia but nothing I try works. I can't even come close to beating it with a maxed out team anymore. :(