So I'm playing thins game last night, 2 chaos bikes and a daemon prince on one wound are near my devilfish. Melta shot takes out devilfish, 6 men survive. Daemon prince charges the remaing FWs, I am in cover strike first. I get 1 5 to hit, I then rolled a 6 to wound, now praying to all the gods that he will fail his save and he rolled a 2!!!! FWs took out his daemon prince! In effect my Shas'ui poked his pulse rifle into the daemons 'special area' and pulled the trigger. That shas'ui is so getting promoted. To make it even sweeter, they then charged the bikes and killed off the last bike as well. Could not believe it.
They then had a defiler drop a battle round on their heads and they all died though, but they did well.
The turn before, I had taken his daemon prince down to 1 wound, fired my Ion cannon at it. 3 hits, 3 wounds, and for his invulnerable save, the slanneshi daemon prince rolled 3 6's for his save! It must be a sign.