1.- Leaving Blessing lvl 3 and just rank up the attribute is enough, Sacrament lvl 5 is enough too.
2.- It works as preventing death, basically if a party member receives an attack that one shots him and he has Revive buff he won’t die from it and instead going to active the invulnerability from Revive (he stills loses the HP I believe though, but with maxed Revive he’ll have 10 secs invulnerability, enough for you to heal him).
3.- I personally feel like going Priest C3 is the way to go.
4.- It doesn’t work with bosses, works on PvP but it can be cleansed.
This is the build I’m going when F2P comes next week:
I’m also taking Oracle but instead for Rank 7 going to pick Kabbalist, the reason it’s pretty much because even though I love Oracle’s concept (and the costume <3), I feel like C2 offers so little while Kabbalist can offer more, specially with Ein Sof SP attribute (PD might be better but I don’t really like him).
Problem with the build though is that it has way too much buffs, so you’ll need to carry quite a few Daino Scrolls (which might be a problem when they rework Pardoner in the near future).
Also, the reason why my buffs aren’t that high is because Mass Heal, Revive and Stone Skin should be maxed imo, they offer you really good utility, leaving you with little points to invest into your buffs.
So far going for a 4:2:1 SPR:INT:CON ratio but I’m tempted to drop the INT and go 4:1 SPR:CON ratio instead.