If your Tarou is high level enough, sometimes it doesn't matter that he only take sout one enemy at a time, because at least, he one-shots them and also he's such a huge sword he takes very little damage
i mean, the life of a saniwa is yelling 'FUCKING TAKE OUT THE YARI/THE KUNAI' while watching your ootachi mow through enemy tantou and leaving your smols to deal with the big swords like why do you think I took you with me sir
since I lose them a lot in 7-4