I know i should learn Taunt (i do have characters like Lycoris who evades a ton and Helenium who counters all the time), but what about Recovery Boost?

It says it boosts recovery effects, but also Max HP (heals beyond it or something if I look at the wiki).... is that worth it?

those are the only two abilities I need to unlock (in fact, i powered up lycoris so much that she can't progress anymore until these things are opened up)