in past there used to be holy pomander to balance healer classes, but i am not sure it wont have negative effect if it ever was implemented here instead of positive one (would have to be balanced which skills can be learnt, amount of pomanders each healer gets [e.g. BP gets 1, EE gets 2, SE gets 3?, idk])
that way even if you CP decides to have SE active instead of EE, you dont have to sacrafice lets say PR/clarity/resist shock for which ppl have EE in parties, you could have EE but have empower on it so you dont have to bring SE box everywhere with you, etc. etc., there were many interesting setups back in the time (before people learnt the optimal setup with 2 bishops and 1 learns recharge)
https://l2wiki.com/Skill_Transfer