Any full support is usually far from ideal in the current state of the game. So I’m quite tempted to say no, it’s not.
Mostly because the title of FS causes most to ignore dmg skills, and quite a few builds allow you to bring some dmg without sacrificing utility. So going FS usually means throwing away part of your skill set for no reason.
IMO only build a fs if you know the classes in it well enough, what you want to use it for (pve/pvp/pvx) and ideally if you have a team with synergistic class choices.
PD1 is a good option for its support though, but it does depend on what other classes you already have.
For the pve/pvp/pvx bit I’ll give you a more detailed example:
Bloodletting is good in pvp, though miko can remove it. But for pve it can be replaced entirely by miko/dispeller scrolls.
Fumigate is decent for pvp as well, but there aren’t enough r3 conditions in pve for it to shine. (or not yet at least)
Healing Factor is quite good in pve and pvp both, but it performs best if you team up with a linker.
Ergo if you were to try and make a pure pve build, and don’t run with a linker most of the time I wouldn’t advise it.
And obviously, I can’t yet speak with certainty for the next patch as it will change up a lot of things.
(Esp considering cleric dps took a hit compared to the dps classes. So FS clerics might see some proper use then. )