Assaults are pretty much a hit and run class
Dont decrease both flight and run speed, also boost capacity. They need those alot for air running
Unless you're mia/claire, do not play on melee for too much. Busters can float dash backwards constantly and shoot continuously. Panzers will outmelee you. Jammers can either slow your melee or knock you off with bugsy slicer. You're pretty much dead/survive against aerials. Fortress is your food if you have a shift to chase it and melee it down.
Swords in this game are very shit. Use spears instead, like knightger's.
Drive gun types are fast with mediocre range, very nice with hypershot
Accelgun types are slow, nice damage and range
Breaker types have some aoe upon hit and they hit hard, but shoot slow like accelgun
Always have air run cart
Get either more hypershots, more range, or more melee
Get movement speed, very important
Find high place, but reachable for shooting to air run
These are pretty much basic shit for an assaults