That would be because of:
No Entropy Mark because it's Aetherbow.
QT would be better because this deck is a stallbow.
A question, though. Do you have enough 
to keep rewinding?
QT is much better for stalls - I don't need all my quanta in a hurry; I just need to know that I can count on it being there.
I find that I have plenty of
to rewind, at least long enough to get a few golems pumped up past CC range. The Eternity only needs to stall, not completely lock, the game, since this deck wins with damage. Mind you, I haven't done near enough playtesting to be sure on that point.
I find that it's not a lack of
that leads to losses, but rather not fast enough access to
quanta to gain early board control. This is an especially fatal flaw against Immorushes, I'm finding. IDK, do you think I'd be better off a) trading, say -2QT +2TT? Or, alternately, b) just adding 2 HG and about 5 TT? Or, as another alternative, c) +3-4 Sundial, +3 TT?
Oh, and does anyone feel like doing any testing on this one? I'm prey to confirmation bias, but I think this is a solid enough build to maintain a steady winrate through all Arena levels (depends more on your opponent's deck than on hir draws/hp/upgrades for effectiveness), and possibly even take on a few FGs - FFQ, Ferox, and Lionheart all come to mind as defeatable (perhaps).
Or, even better than just testing, any suggested mods?
Let's make Mindgate a power card!
