I'm testing an experimental list, with white for steppe lynx (in order to have a third guy in addition to delver and guide) and lightning helix (that is so useful against mirror and burn).

4 Steppe Lynx
4 Delver of Secrets
4 Goblin guide
2 Snapcaster Mage

4 Brainstorm
3 Ponder

3 Daze
3 Spell Pierce

4 Lightning Bolt
4 Chain ligtning
3 Lightning helix
3 Thunderous Wrath

3 Volcanic Island
2 Tundra
1 Island
1 Mountain
1 Plateau
4 Scalding Tarn
4 Flooded Strand
4 Arid Mesa

Still tuning the sideboard, but it will look like this:
3 submerge
3 surgical extraction
3 flusterstorm/mindbreak trap/something vs combo
2 smash to smitheerens
2 sulfuric vortex
2 reb