You really need to get your hands on Bee, the seven sworded thug version and either darui or danzo.
Especiallly so if you want to use roshi. Right now the only viable team with roshi and LM is:

x - Hidan - x
Darui/Danzo - LM - Roshi

Even then you need reasonable power to make roshi work atm, need to stack defense etc.