I know, I know, tuning is the last step, but accepting that constraint, given observations upon what's going on among the variables we know now, I'm very curious as to which spec will flourish and excel in an environment of ideally more open ended character loadouts (through soulbinds) and anima power superbuilds! Let's angle this discussion leaving covenant choice out of the variables.
Of course, the initial default to look at is discipline. At its core disc *should* be dominant in any solo or "unsupported," trinity agnostic environment because of the "vampiric" nature of their damage: every point they inflict with their core ST powers heals them, assuming a 100% uptime on atonement, which is easy with PWS. Discipline has a solid core, they just often don't do enough damage to be fun in soloing because "if they can do decent DPS, why bring a DPS class," but in a solo torghast run, that framework of discipline given some boosts to damage not intended for trinity content might make them super heroes!
But don't sleep on shadow, which is getting a second vampiric DoT specifically added to the kit for trinity-agnostic, faster moving content. Depending on the tuning of Dev Plague, shadow's presence as an actual DPS spec with more AOE potential than a healing spec might make them the go to.
And who knows, maybe holy is a dark horse! Once again Blizzard are paying lip service to the idea of "soloing as a priest shouldn't be wrong," and it shouldn't... and with some damage support holy's strength as a healer might make them a contender. I'd call them the least likely (because I'll believe Blizzard on this front when I see it), but I didn't want to leave them out of the post.
I'm asking largely because my main priest (not my main, just my main priest of the three I have) is conceptually flexible among the three specs, and I'm wondering which spec he will be leaning into as a trinity-agnostic build, mostly in the open world and in solo torghast runs!
What do you think?