A replacement for Snapcaster Mage could be Dralnu, Lich Lord. Basically he's better and worse than snapcaster. You can use his ability every turn to flashback a different spell but if he takes damage it's bad for you. So here's how you can use him:

1. Don't block or attack with him. Ever.

2. Protect him with counters, especially from burn.

3. If he gets hit, respond with your own instant speed, non-burn kill spell.

4. Magebane Armor

Obviously not the greatest, but very useful nonetheless and it's awesome to flash back something new every turn.

If I were you, I'd try to find some Scalding Tarn to run, since the fetch-lands help your delve out a lot. When you do come across some Snapcaster Mage, you should run as many as you can. He, among other things, allow you to burn them out with just Lightning Bolt

This might be simple but it could help. I would:

-1 Murderous Cut

+1 Go for the Throat

bassrockn why wouldn't you just run an additional terminate then?

You have less land than even a average aggro deck has...Generally a control deck (which you are definitely playing) runs at least 24-26 land.

Cryptic Command?