100% THIS. I started my main as a chakra medic but after 2 weeks had to reset, it was nigh impossible to complete many missions and levelling was 1/30th as fast for any other discipline. I completely agree that you should get (A LITTLE) XP for healing someone (not for using the jutsu). Maybe make it based on health actually healed or make it something like: (hp healed/2) * player level". Possibly even make it solely for Treat Wounds since you cant even use that on yourself so it is completely useless for levelling as it is.