[Autumn]

If you just remove the stipulation that if Purple/blue goes last then Blue/purple must go first on the next round then you'll remove a lot of the issues people have with the system up until people start getting killed. Since the turn order would remain static pretty much even if summons are brought into the equation up until people start dying, which is a lot easier to predict/control.

It might also help if summons were just completely removed from the player's turn order entirely. As it seems like most of the problems that are had with the system are with summons seizing away your own team's initiative, if you have a summoner on your team and your opponents don't, you may as well be a full team of tanks given you'll never have the opportunity for that most important first slot anyways.

What I mean by that is just having summons play out and resolve their turns separately from the player turn order, a sort of mini-round that occurs at the end of the round.