I just had my first Paladin fight at Lvl 23 on a Lvl 24 mission yesterday. When I saw a Commander at 11k(?) HP, two Flying Wardens and two 6k+ P Heavies, I feared that Ironmode Hardcore team was done for. The fight was rather intense and I have no recollection of how I won it, but I remember:
1. Force Psyker kept putting up Mirror Prism as and when it goes down. Outside of putting up Mirror Prism, Condemn for almost 1k of damage and Purity Prism to remove debuffs. Manifest Spirit to help with damage and attracting damage when available
2. Hacker spreading his Virus attacks everywhere and stunning enemies as and when required to allow time for health recovery or Mirror Prism to go back up.
3. Smuggler throws a Flashbang to blind pretty much in the beginning and gets in a Kalmonri Trap for the purpose of distraction when needed for Mirror Prism to go back up, and Volatile Trap for damage. (I forgot to replace Mug with Coin Toss)
4. Void Psyker puts in a Siphon Life constantly and Torrent focus fire on the Commander first.
Truth be told, maybe I was lucky with my team makeup, but the fight was intense and fun to say the least.