This looks like a good approach, and I do something akin to this, basicly taking it 3 times a week at 200mg a pop, unless a huge intensity is necessary and I'll toss down 400mg for a workout, but that is not very often, and especially in my phase right now, not doing the DC workouts anymore for the moment.
For the price and availability, you can't beat plain old caffiene in my book. Ephedra while potent and possesing superior fat burning capabilites, is much harder to get, and a bit hard on the cardiac muscle as well IMO. Of course the eca was and still is unbeatable at the original dosage of 25/200/low dose aspirin. per hit.
my two cents,