My thoughts on a couple of these. I'm not trying to rag on anyone, just thought it might be helpful for people to hear why I didn't vote for certain things.
Instant aging: it's firebolt only better. Time should not have better damage dealing spells than fire. Cut the damage to two and then maybe we'll talk
Reverse Spawn: instant death to any deck that doesn't have time quanta. This spell can not only instantly remove a big, scary creature regardless of it's hp, but fills a slot on the enemy board with a useless creature.
Future Shock (not upgraded delayed bolt): It's improved mutation, maxwell's demon and parallel universe rolled into one . . . as a time card. Seems a bit like randomly handing three different abilities from other elements to mono time. I can appreciate the theme you're going for though.
Mare Crisium: could be really OP with deja vu . . . but I can't be certain. Still making up my mind on this.
Delayed Bolt: Three turns is a long time to wait just to take out one creature . . . maybe cut the delay down a bit? And does this use your quanta total when you cast the spell or when it goes off?
Essence Cycle: Wait, why is this a time card? It isn't effecting time quanta (aside from those used to play the card). Seems like it's designed to work only for a very specific type of rainbow deck . . . at least if I understand the card correctly . . . very confusing. I agree that there should be more ways to get quanta, but many of these cards I see seem to be very complicated and confusing.
Shifting Sands: Very confusing, and I'm not really sure what the aim is . . . seems like an attempt to boost mono time by introducing an unusual sort of pillar control. The upgrade just makes the whole thing utterly bizarre, in that it implies the non-upgraded version only works on non-upgraded pillars . . . it also seems like it would be very limited in what sort of deck it would be useful for.
Alchemist: OP, several other people have already said so. And why is this a time card?