Ehren, Enduring Paladin gets to cheat and be a "big" creature but not trigger Strongest because his casting cost was only 5 to offset his damage gimmick.
I've been thinking... For Malakai Priest...
1. Lead with Ehren, Enduring Paladin and put a Regrowth on him.
2. Drop a Messenger of Bim-Shalla and maker her your Holy Avenger. Oh, and she heals 4 dice-worth on Ehren.
3. Summon your choice of Aurora Lucere (vs minor creatures / "swarm"), Red Helm Knight (vs "buddy"), or White Cloak Knight (vs solo, esp Wizard or Warlock).
4. Once healed, try to have Ehren guard to draw "vengeance" from the Messenger, while beating down threats with Aurora/Red Helm, then go for the kill.
*edit* Oh, and pray that they never print Debilitate: