x7 capacity x2 internal and quick boost. His capacity is limited, his cart selection sucks, and you really want both EIW if you want the internals to do anything useful, so this is pretty much the end-all build for him if you're expecting to get good stats.
Spam subweapon at long range at targets that are at a lower elevation than you, as the homing increases with more height (love Tengu BS for this). The pulse missiles wreck lands, but their large spread makes them useless against anything airborne. I'd recommend a mini bazooka for airborne targets (especially air-to-air since cluster is horribly crippled in this regard). Put whatever you want in the other hand. I've also seen a lot of people go double buckler with weapon arms on him, which could work but is probably better with neo since his subweapon works for anti-air.
Also, tallish legs might be a good idea so you can stand on cliffs and fire the burst beam over them without a direct line of sight to what you're firing at. I used Izuna LG on mine. If you plan on abusing the pulsemissiles more than the burst beam then use lazflamme/patty/froglander LG instead.