Always reload before using [Evil Mojo], as you only get a short amount of time to kill off everyone affected. It is also a good idea to save it until multiple allies are nearby, if at all possible.
Flank/Damage pip is not as vulnerable as other builds use more caution when approaching him he has high burst damage and a heal. if your going to flank him try to wait till he shootsthe catalyst on someone else to give your self an edge.
General heal Pip tip: When using cimbat medic, use cards which make your explosive flask have a lower cooldown and generare ammo so you don't have to reload to heal. If you are not sure, buy deft hands as well (Personally i like cautertise on Pip).