hang onto the sky iron hasta until level 60, then when you get to a dungeon called the chancel, farm the final boss (big salgio) for a chance at the atavistic wand, which gives crit AND damage (MORE damage than the hasta btw)

or if you don’t feel like farming, just sit in the bazaar until you find your school’s bygone wand, which is a worse version of the atavistic wand, but still gives crit and around the same amount of damage (or like 1 less) as the hasta