Here's my list:
4 Chromatic Sphere
4 Dark Ritual
3 Duress
3 Empty the Warrens
4 Gitaxian Probe
4 Grapeshot
4 Lotus Petal
4 Manamorphose
4 Ponder
4 Rift Bolt
3 Seething Song
3 Preordain
2 Giantbaiting
Spells [46]
3 Ancient Spring
3 Geothermal Crevice
3 Island
3 Mountain
3 Sulfur Vent
Lands [15]

I've been able to pop the storm off as early as turn 2 (with lucky draws) but more consistently from turn 3-5. If I don't get to pop on 5 I'm usually screwed (or the storm is really big). The Giantbaiting is more of haha card, I've played this deck in peasant format too with Tendrils of Agony and it's way better but as the pauper version here it is a ton of fun to play.