[1.2.331] [KOR] Mechanic Skill Tables

The 100% Stance on that 4th job tank skill is really nice. However the mobility sucks, but that seems to be its only real con. I think you can only use Laser Beam, Flamethrower, and their single-target attack while in Tank mode. I'm confused as to what their main single target attack is though. At some points in that video Spadow was using a 6-shot attack while on the tank, and a 3-shot attack at other points. The 3 shot attack hit much harder. What skills are those?