I'd say Varland since the stuff is outrageous, but with the likely possibility that he headlines an opener game I don't know if that changes his usage in a playoff series. Maybe it doesn't though?
Dominguez is a little like Hoffman, except he trades giving up bombs for the likelihood of way more walks. He's pretty unhittable though, the stuff is nuts here too. I think the bullpen hierarchy should definitely come down to who has the best stuff right now. Varland + Seranthony are up there, Little too, with Fluharty and Fisher being firemen ready to be used at any point in the game.
I'm as big of a believer in projections as anyone, but the projections are a different story than like June when Hoffman was still throwing 97 with regularity and getting shelled, than this version who throws 94 more often than he throws 96+, with s***** command of all pitches to boot.