Take it easy for now. Maybe you ought to go with those guys and let your mana recharge for a while; you can mutually keep an eye on each other.

[He calls the group back.]

Hey! Take him with you, in case you run into more trouble!

[Tsuna did an amazing job and Hijikata wants him to feel good about it, and at the same time he wants him to have some safety in numbers while he's drained like this. He himself can't look out for him nor take him to the citadel for a mana boost (which Tsuna might not even want); he has to use what little time he has as a Familiar Fusion to exorcise as many wraiths as possible.

Also he caught a curse and Tsuna shouldn't be the one who ends up lugging a way bigger man around!]