Earth dps help needed please

You Brawling->Shuriken Storm by spending:
20 SPs in Martial Arts + 1 SP for WM
20 SPs in Brawling + 1 SP for unlocking WM + 1 SP for Shuriken Storm Mastery

This is the fastest way to build up your Super Charge, BUT you will do less damage with it. As someone mentioned before, WM Crititals do NOT apply when using your Pet, and Brawling->Shurkien Storm does very little damage (compared to the other big weapon attacks)

The usual recommended weapons are 1H/Flip Slash (clipping your powers), or Hand Blasters/Solar Flame or Scissor Kick (clipping).

Yes, you should unlock Gale but may want to save it for Boss fights, depending on how fast your SC builds.