Well, I have an Oracle Chaplain, maybe the class path with most buffs (in quantity) in the game, and I still find it manageable.
It’s just that most people want to buff with every single thing they have, but 70% of those buffs aren’t that useful.
Stuff like Sacrament and Last Rites are only benefiting yourself and quarrel shooters in your party. If you don’t want to overbuff other players that don’t have a token, you can just walk away from buff range and buff only yourself. Those two buffs last long enough so that’s not a really annoying thing to do.
If they use a bunch of less useful buffs for themselves that makes them lose other buffs, that’s their own fault. It’s like players low on health who won’t walk into heal squares.
From the buffs you mentioned, the only ones that indeed make a huge difference in a party are safety zone, divine might and stone skin. Blessing isn’t a big difference on end game, Fade is barely useful in PvM, Aspersion is pretty bad for PvM, Monstrance is too hard to keep up, and Revive is just plain annoying: it doesn’t always work, sometimes it bugs and you are stuck with a zero duration buff, and when party members are dying they will just run away from battle and stand still till you heal them (and not use revive effect at all).
And even if I use Last Rites, Aspergillium and Sacra for myself, I don’t really care that much if they get overbuffed and disappear because my damage at high level content is pretty weak and disposable compared to wizards and archers (sad but true).

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. I’m not going to suggest someone to take a path that, from my own point of view, isn’t a good option just because it’s something easy to do. Sure it might be a little more troublesome to have to think on what to buff depending on the situation (instead of buffing everything). But to me, it’s worth going through that trouble when you can pick a better class option and have a better utility instead.
, would this build be good? 