I just started on AST but I've been prioritising Piety. I'm not quite ready to heal savage quite yet, but having a higher cushion for MP usage on DPS or healing suboptimally because I'm an idiot definitely helps. I personally prefer det to crit because it's a more reliable stat but I can certainly see the benefits. SS is limited by your piety and I think I'd put it over crit because its a more consistent stat much like det, but as I said I'm kinda new to this whole thing and fight length makes it a dead stat in a lot of cases...

I'm sure everything I've said has been brought up before, but that's what I've been trying to gear towards anyway.