I don't think scorpions are as fast as immolations, but if you trade the dragons for bone walls, then you can benefit from their immolations while you're increasing damage. Not to mention the bonewalls will help in stall decks too. And maybe take out a couple of the nightfalls, I generally go with 3, and that just happens to bring it to 30 cards! ^^ So I came up with something like this:
Hover over cards for details, click for permalink
5uq 5uq 5uq 52g 52g 52g 52g 52g 52g 52g 52g 52g 52g 52g 52o 52o 52o 52o 52o 52o 52q 52r 52r 52r 52u 52u 52u 52u 52u 52u 8pt
UTAlan's QI tool (
http://elements.alanbeam.net/qi.php) says you might be able to benefit from replacing a bone pillar with a nightfall too. Darkness quanta doesn't matter so much since you only need one at a time.