Bistan most likely wouldn't help too much in that situation. He does have a DoT effect and can remove TM(but it's based on potency which he mainly gets from having rebel allies) I do have him 7stars though since I had the fleet coins and I like his ship. That being said for lack of someone better he could be a decent addition. You can make him fast pop "Frenzy" and go twice after the other toons use their abilities and try to hit with his basic twice for more DoT or depending on the situation you have the chance to remove TM = to his potency