AST Gear BiS

[Cynfael]

Crit is not that amazing from a healing perspective. The only reason SCHs tend to prioritize crit is that Adloquium is fantastic when it crits (and shielding in general is much better with crit, but I'm not sure I would take the same approach with AST just for Noct). Otherwise you are usually better off prioritizing DET if you are purposefully timing your heals (as you should), since crit tends to contribute to overhealing.

For healers other than SCH I personally prefer DET and then PIE to taste, followed by CRT and finally SPSPD.

As for how much PIE you need, it's more of a preference, yes. It's rather difficult to wind up without a functional MP pool since PIE is very common on healer equipment, but WHM and AST are likely to prefer higher PIE values since they don't get 20% of their MP pool back ever 60 seconds in addition to the ability to use Energy Drain, like SCH. Their MP restoration tools are decent, but not quite as powerful as Aetherflow.