Don't wanna sound offensive but you clearly have no idea what are you talking about.
If you choose path of chakra medic, you cannot expect having 3 high damage jutsus and awesome healing ability over any other mastery.
Chakra scalpel instant cast would be just unnecessary too op, it's already same cooldown as it lasts with only 1 second cast time. It gives people good option to play around it (as your enemies) and it also makes fights more interesting when people realize it's your main damage and they actually can prevent it being cast instead of just getting op dmg buff for free with no cast time.
Adding some kind of slow after some number of punches sounds interesting, but I would say after like 10 hits, no less as it would just become way too good for not only chakra medic, but for tai/medic aswel.
AOE heals are promised to be for advanced, be patient.
Scalpels are fine as they are now, ever since they moved tier down, it became HUGE buff because you are able to get them 7 levels sooner than they originally were (chakra scalpel).
If you wanna be medic with more damage jutsus, you need to sacrifice heals for int and choose poison path.