When I was trying that discord deck (against AI3) it usually either worked wonderfully, or failed miserably. If you don't draw a discord early, opponent has deflags or steals (extremely powerful against discord), or he manages to play a phase shield (blocks discord) it's usually game over.
Also, adding 3 discords would also require us to make simply another entropy deck (15 more entropy cards), so we'd have to take more entropy pillars (needed to play a discord as early as possible) and some use for the extra
so it could be a fate egg mutation rewind deck or a copy of this dissipation shield deck.
Still, I think we should go for versatility rather than duplicating decks. I'm pretty happy with what we have so far and I think the best we could change right now would be to test these decks and tweak them. Sadly I don't have time for that, so if you could test and tweak these decks before the Vault is closed it could help a bit.
What I am afraid the most is if other elements build good counter-time decks with permanent destruction, quantum denial, a rush of immortal or cheap creatures etc.