Well, let's see:
1) 3T Itachi was already keeping up with Bee in CQC, reacted to an attack from behind, didn't even get scratched in their skirmish, and knew when to retreat.
2) Provided he catches him in it, Tsukuyomi one-shots. I don't want to hear no BS about Hachibi breaking him out, since:
- It's been stated at least twice that only a Sharingan user of the same blood can break it
- Even if we ignore the hype, it breaks down the victim's psyche and inflicts great mental trauma, resulting in a comatose state, all in a second. Hachibi already took at least 5 seconds to realize and snap Bee out of genjutsu, so there's nothing he could do against Tsukuyomi.
3) Amaterasu ensures at least a draw. The pain will keep Bee from firing off a TBB, and even though he can just cut his tail and escape, this trick will only fool Itachi once, and he can just camp the fallen tentacle for a Totsuka impale.
4) Any small genjutsu + Totsuka blade before Bee is snapped out = GG
5) V4 Susano'o with Yata can likely tank a single TBB, or at least Yata will make sure Itachi lives. Continuous TBB are definitely a game over, but Itachi would have won by then.
Hashirama Senjuu said:
Anyone who says totsuka is dumb. Kishimoto stated that totsuka was a variant of the kusanagi blade, the only difference is that its not in a physical form.
Kusanagi couldn't pierce v2 Naruto, totsuka cant pierce any tailed beast.
Lmao. Kusanagi couldn't pierce a Naruto that was protected by Kurama's chakra fully, which has nothing to do with the durability of Hachibi's tentacles, who were cut in half by a freaking
kunai and later a Chidori spear. Also, RBSM Naruto got canonically stabbed by a simple sword - I guess KN4 Naruto > RBSM Naruto, huh? :lol
On a side note, I think it's become at least semi-debatable whether or not Naruto's modes (KCM, BM, RSM) offer any significant protection from blades.