[1.2.320] Massive Buff

i understand wad u mean, wad im saying is that when comparing with other classes' 4th job skills: example genesis

as the lvl of the skill increases, the dmg output increases, the MP cost decreases (wad i will call user friendly as the lvl of the skill increases)

but for our assasinate, wldnt it make more sense to be charging for longer period at lower lvl of masterydoing not-so-high dmg while the charging time lessen while the dmg output increases as the lvl of the skill increases. (userfriendly, in this sense , is wad i meant)

No, it charges longer at higher levels to deal more damage upon release. Higher level means more base damage and more time to charge, yielding higher charged damage. Regardless of level, you always have the option of not charging it.