I think the meta will be: SCH/SGE for prog, SCH/AST or still SCH/SGE for everything else
My reasoning: SCH and SGE seem to be very strong together, the only downside is that you can't stake Galvanize with Eukrasian Diagnosis/Prognosis, which doesn't really matter. Lots of passive healing with Embrace and Kardia, big shields and enough burst healing. 10% damage mitigation available at all times and a 20s movement buff to resolve mechanics easier. For farm and speedrun parties, SCH and AST still have their rDPS buffs
Factors that might subvert my prediction: I don't think anything can change SCH/SGE being better for prog, but RNG may push AST out of farm/speedrun parties if SGE can bring more DPS if AST has bad RNG.