why not make Auto attack as an ability ?

You use skill "Auto Attack" will make you attack faster and limited skills to use while using Auto Attack.

Auto Attack will give boost in TP for a time to charge up and do DoT , there is timer for this ability like 1 mint recast and last for 2 mints.

just a thought about the Auto attack is like a charger of TP or charger of skills ? like with Auto Attack you can unlock new skills.