Part of the planeswalkers being hardier than dorks is a trade off for all of them being far slower to actually finish a game outright rather than obtaining a concession
The MTG team described playing the games themselves (especially if they hadnt played that particular entry), then creating three categories for the Final Fantasy elements, from the need to haves (category 1) to that would be nice, but we probably wont have room (category 3) and discussing with Square Enix even at this conceptual phase as well as consistently showing them specific cards and getting feedback
Prismari Artistry (Blue/Red) Cast splashy spells, create elemental attackers Rootha, Mastering the Moment turns instant and sorcery cards into X/X Elementals, with bigger spells making bigger tokens
if youre running Gishath, Sun's Avatar or Zacama, Primal Calamity, dont skimp out on that mana base because you will lose a bunch of games to mana screw
Combine it with some Auras and Equipment like Rancor, Loxodon Warhammer, or Fireshrieker, and you could be one-hit killing your opponents with ease