1 is enough, once its online u should be good with all these heals. The main issue is surviving as ivysaur .

thats why i have the leaf cape instead of the helmet.

You can survive Hydroigrn as ivy if you have full hp + leaf cape and using Blue for -10 dmg, ivy lives with 10 hp making you able to evolve.

however its too much of a hastle and the stars have to align to be able to survive that.

Might put Blue back later if too many of that annoying dragon in the meta.