I don't know crisis core, but I know that's Zack CMOA.
He'll just gain more and more sword (until the last one, anti-golem sword, appear in V7 arc).
As for training, still the same (Houki for close combat, Madoka for shooting, Cecilia for aerial combat maneuver, Rin for tactics and strategy, and Charles as his sparring partner).
The damage? By theory, they shouldn't.