The skills are fine as is. Both hide and sneak attack are only good for dungeon mobs and solo content. Boss fights take you out of hide. Suiton is the go to skill.
For those that don't know yet, Suiton is a atk that grants the user the effects of Suiton for 10secs. I think the description should had said hide but you dont actually hide so maybe it's correct. Anyway you can trick attack multiple times throughout a battle because of this.