This format is probaly more fun to theorize about than to actually play. I think i'd try to build something that allowed me to chain time walks for a bunch of turns in a row. with 4x Walk, 4x regrowth 4x Demonic and 4x Yawg Will (maybe only need 3) we should be able to do it pretty fast and consistantly. Also with many natural predators to this sort of strategy being restricted (Spell Snare, spell pierce, REB, Extirpate, tormods crypt etc) we should be able to do it without much resistance.
i think this should be tested out. of course what if you chain time walks and they just chain balance on you?