One last change before I can affirm that I have finalized my demo ahead of plans set for late July (seeing that events are dropping left and right with BlizzCon as the latest recorded casualty, the guys running the PAX Discord decided to do an online variation which has spiked my interest levels). Specifically, the core mechanic is the availability of an ultimate special for each party member which can only be activated on a full charge... and obviously these abilities are intended to be able to shift the advantage back in your direction. And obviously I want the ultimate skills to have a priority value that's basically over 9,000 (or in other words, that whenever a party member uses his or her ultimate special for a given battle turn then he or she will always be the first to act during that turn).
As always, if this is better achieved with a plugin then you're free to move it (although it's technically still a general design question, so I'm starting things accordingly for the subject).