The only thing bothering me about Ninja is that Summoner can use Radiant Aegis which is exactly the same as Shade Shift but on 60 Second Cooldown with 2 Charges and 30 Second Duration. They both give a 20% hp shield but the class stuck in melee range has an all around worse version. Shade Shift needs an upgrade that includes charges at the very least. Reaper got a heal so strong it had to be nerfed.