Obligatory opinion warning, but I think these are some really big things we, as a community, need to keep in mind when suggesting what should happen with healers going forward.
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A new healer is not an effective way of fixing the meta. Not without overhauls to one of the current three healers.
Say we had gotten another healer for Shadowbringer, or we’re going to get another healer in 6.0, players progressing through to the point where this new healer is prevalent in play, usually passed its starting level, is therefore, unbalanced, with exceptions to instances in which the new healer is playing lower level content through Duty Finders, or Party Finders.
Balance is not a matter of new skills unlocked in the new 10 levels released in each expansion.
A very key skill in each role can do a lot to shift a healers placement in the meta, but when many of these key skills are oGCDs, it’s important to make sure equivalent options exist for each healer outside of their unique kit, at equivalent levels. Cure I is boring and important. Benefic is boring and important. Embrace is boring and important. These spammable skills are what determine the vanilla strength of a healing. These same basic skills could never be exempt from a new healer suggestion.
Truly unique kits are what make players want to play their favorite healer.
As an Astrologian main from 3.0 prerelease, I remember when we were the weak job. When we needed the buffs, but I also picked up Astrologian for the cards I saw. It’s my belief that Astrologian needs to release its grip on the other healers kits, among other changes, in order to make a genuine step towards balance. We do not need the sect system. I feel I’ll especially get comments on this, arguing for sects fore the sake of arguing for them, but please keep in mind, no other healer has a secondary kit option in the same way that Astrologian does. At the very least, the system should be tuned down, maybe making each Sect work like a buff that stays up for a limited time, so there’s no question as to White Mage being better at traditional healing, and Scholar having an iron grip on mitigation.
After the basics, fitting a niche matters. Not all niches were made equal.
Niches are big, they’re unique, and they’re easily understood. Massive healing is a niche, mitigation is a niche, buffing is a niche. HoT is not a niche, it’s just a modification to a normal heal. Other niches could include, totem healing or “item” healing, there are some good options that can be fun and unique, and there are some that just don’t work.
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Of course, I’d love to modify my ideas to coincide and work with what Yoshi-P has already stated he’d like to do, and like to encourage players suggest more fundamental ideas within those grounds, but I honestly can’t find many of his statements on healers, and what few forum posts there are don’t list sources.