Suggested by Destroyer Black Tom Cassidy has always been more of an underling than a mastermind so he is already below Kakuzu when you’re comparing their tactical awareness levels. Kakuzu is able to control his spirits and fight at the same time so he is able to multi task quite well. Tom’s staff may prove to be some trouble here, but Kakuzu can endure some hits if necessary on his way to victory. Such attacks certainly wouldn’t end him. Kakuzu wins.