Dimensional shields cost too much. I think what would be good is Lightning as it kills in 1 hit and costs only 2. Again Quintessence costs too much so I think Otyugh with some Momentum to make them have 4 hp to eat shriekers is good. Then just have some cheapish creatures which is basically golem. Golem isn't very good though.
An alternative is fire with Fire bolts/Rage potion to kill creatures and Fire Eaters as our damage source. It is more vulnerable to Reverse time though. Throwing in a Fire shield may be handy too.
I don't think they will use their shield so chargers aren't very necessary.