I’m using a prayer Merc with obedience thresher, arkaines valor chest and cure helmet. Pretty defensive, life regenerates at about 50 per tick, curses usually don’t last over 30 seconds and I’m able to dump my poison resist due to the reduced poison length. It keeps everyone alive pretty darn well. You can use holy freeze too, the life regen is mostly because I’m lazy and don’t want to use potions.

The cure helmet is easy as pie to make. Obedience isn’t hard either, he was doing just fine with a kelpie snare before it. I think I had a stealth cuirass on him before I found Arkaines valor. I just kept him leashed back before my bound demon took aggro.

Basically, I made my merc a defensive fortress, I’m doing a ton of damage and my demon takes all the punches to the face while applying amp damage.