Ok halftooth here has got this one significant problem that anybody who plays him knows about: he sometimes stands around doing nothing, like he doesn't know what to do.
Maybe he really doesn't know what to do, or maybe he's just tired. I don't know. He used to do this with regular Sol, too, with his famous GUNFLAME FRC->stand there looking cool. It happens once against Eddie where Eddie just runs up and command grabs him, and it happens multiple times against Millia where they just come to a sort of standstill and then Millia takes the initiative and messes him up. I can't say that I play HOS, but anything's got to be better than standing there doing nothing. j.HS, or d.S if you're close enough, or rock to close that little gap. It's not like you're being zoned out; you're just within reach or just a little out of reach. Do something.