I agree with a deflag splash for aether. Better to salvage 6 less than to lose 6 more.
I'll leave Darkness to you, I don't know it well enough.
Against Time, either Quinted Spiders or Flying MS for obvious reasons. I would like to know which one, though, because it might be useful for me.
Against Entropy, me and jippy had this Bonewall OE + Wings idea for some reasons. Also, take a good deal of cards in it, and some poison. First, they could go monoentropy easily, and this round they have a good reason to. They can bring a Pandebonium, potentially, or an entropy decker, which is why I'd go for poison and a good number of cards. But, I have a feeling they will try to rush us with dragons / aboms / discord. Mono entropy, easy and effective. So, pack shields (wings to kill an early discord, then bonewall). Kill their creatures with OE. Test it against a number of monoentropy and against pandebonium... if you find a deck that beats them, you're golden.
I don't agree on the Earth matchup. They *WILL* bring earthquakes in about EVERY deck, unless it's the decker. If it's the decker, having lots of cards is golden, but... I'm scared of their rush/control. Graboids splashing RTs are a killer for us, and that deck is no exception. It's slow, and prone to bad draws. I don't think it will be a good idea. If you want to try a decker... go for a wings deck, maybe use the entropy duo. Discords and Antimatters to slow down and absorb the damage from dragons. OEs to kill their creatures and Wings to avoid their other attacks.
Gravity... I don't see alternatives. Grabbow and good luck Amilir.
I like TUs against Light, although I said EQs are a good chance too.
Now, for my match. It depends on your choices, but I expect two decks here: firestall and RT splash. I have two decks that kill them: one with quinted dragons and lots of control, the other with EQs and lots of control. I'll test them this evening, and report.