In another board, there was a discussion about how at AI3, the computer occasionally plays a mono-time deck that everyone agrees truly sucks. It has no rares and really can only win by getting good draws on its fate eggs.
My suggestion is to beef up Deja Vu. Instead of making it copy itself and both copies lose the ability, allow one to keep the ability. This "new card" would be insanely easy to implement, since only one small change would need to be made. And this would allow time to swarm or pair quite nicely with light for blessing or entropy for chaos blessing (yes, these are already decent but with new ability, this deck becomes much more workable).
Anyway, time as an element is mostly just a ghetto for cards that only rainbow decks use. The deja vu alteration would go a long way towards making it relevant.