If pets ever get to the point of needing those, might as well delete them from the game 
It is amazing in theory, but in practice you summon Familiar > it dies the next second > you wait like 15 seconds for its CD to refresh while all the points you invested into it does nothing for you.
Only reliable pet healing options atm are Blood of Dreeg and Wendigo Totem.
Legit considering building with Bonescythe for its +1 summon limit to Totem 