I’ve had a lot of success in play-by-posts on the old forum with [Growth]/Strength/Anarchy and [Growth]/Strength/Fire. The Galina Glimmer + Mythmaking combo is really strong against decks that don’t have good removal, and even then it’s still hideously cost-efficient. Green’s tech-0 defensive abilities + quick Bird’s Nest is also solid.
Both Red splashes work well. Fire gives you some targeted removal, which Strength and Growth lack, and also haste. And an obnoxious synergy between Lobbers and Earthquake. Anarchy gives you Zane, Zane’s combat tricks (Chaos Mirror is pretty crazy when combined with buffs), and more anti-air than just maxband Arg.