I played a 700-point game of MagicScape the other day. Worked really well. Assign each general a color identity.
It was Gideon vs Jace, with Gideon wielding a 4th Mass build, and Jace fielding mostly ranged units from Vydar. Heroes, along with squads, started the game in the reserve. They would be summoned by the Planeswalker. You could also cast spells that targets a Unique Squad to target a Common Squad instead, provided you identify the different members of the Squads. (AKA Uncommon Squads)
Some Errata needed in this game. Probably more later.