I've recently switched entirely from the Huit prime to RAC partisan; the greater maneuverability adds to its survivability and response time.
Harr E has always been great for early game Vtrolls, it still is.
This man speaks the truth. Parti B is the best AA in game. Huit Prime is crap. It's really just that the Partisan is faster and can get itself in better positions, Huit prime just can't react to a changing battlefield, and the Partisan can more than protect itself from ground assets.
Though, 6xLBX/2 on a Partisan would be boss.

EDIT: Oh yeah, I wish folks would stop using the D and E variants of the Partisan for AA,
they are lackluster, although the Ltgauss one is the better of the two.