AST to move away from shield/regen stances and instead be a delay/prediction healer (skills that get stronger after waiting, like Earthly Star). If the dual-stances must be kept, the second stance would change the delays to be based on low% HP instead. (Maybe a TBN-like Shield that is only cost-effective if it breaks?)
Malefic would go back to 2.5s, but we get Stella as an instant cast. Stella gets upgraded to Comet (more damage than Malefic) randomly based on combust ticks