It depends on your group and what the other healer is wearing...
I was about to say the same, even though I’m not a healer guru... But on the other hand, surely there are most likely some existing do’s and do not’s (like using Hiti or other “close to healer affecting” set in AS final boss (my own reasoning)) or ways to improve performance in the best possible way. For example when and where you need more heals, where dmg shields and where sustain. So if there are some lists, hints or tips, I’m also interested.
There is no hard and fast rules for sets on healer. Depends on group comp, healing class your on and your healing partner's sets. If you want to explore/learn more try joining Healers Haven on Discord @Rudrani