This is something that has been brought up over and over but hasn't reached rory yet so this is another try at it, imma keep it short n simple.
Blood Tonfa + chakra scalpel is simply too strong allowing the user to hit 100+ on melee with a fairly good attack speed. There isn't any sacrifices for such a strong build here's an example
With tai crit scaling it gets even scarier
melee masteries were never meant to be dealing this much dps this is just too strong with Tonfa able to heal aswell