Edo itachi. From what I can tell Rinne sasuke got stealth nerfed when his BT was released.

I don't have a clue what explosive mode 1 or 2 do, there isn't a description any more. I've got both and can't tell the difference other than on an obviously innacurate sample size of 20 of EM 1 and 20 of 2 he seems to crit less with EM2 which seems idiotic. One thing I can tell you is he no longer gains an extra attack.