Without sb itachi do not reflect any status, he just is immune to debuffs.

@OP:another easy to run team that in most of the situations works is jinpachi, mangetsu, yagura. This let you break the barrier or heal the main if needed (by copying an mb with root, a bd with flower guard or a real healer, that if azure fang maybe boosts you too with water enhancement and poison tai), add an acupuncture and at your choice is able to let you use shark bomb in round 1 and mangetsu mystery let you use jinpachi mystery up to round 6 with no interruptions or let you hit with yagura twice that let you hit the 10 combo the same if jinpachi died.