Well, my L/I campaign failed at the Chosen Stronghold. I had Warden Armors and Plasma weapons except for the plasma lance.

The Resurrection room just destroyed me - I had a Chryssalid King and Archon King warp in - their ability to attack after every time I attack them PLUS the need to shoot the sarcophagus was a catch-22.

Anyone have any tips before I give it another go?

I just read DerbK's advice to have flashbangs available for Primes. Anything else? Should I not kill the Primes then focus on the Sarcophogus? Seems if you let them all live, it'll make killing the assassin a lot harder.