Yes true, the problem there is mostly having more abilities at high levels compared to having none in Sastasha. Syncing the GCD potency to be similar to all the others at that level would be one thing because all GCDs share a cooldown but it's more complicated for the others. Getting an overall potency for damage and healing over 60-120s each at that level and distributing it proportionally among all attacks is a good idea, but probably complicated when different attacks work differently, such as Dream Within a Dream, astrologian's cards, party buffs, Chain Stratagem, Trick Attack and Mug.