bolt is always great, if you're going peasant forked bolt is a good choice. I'd also use fireblast since your already looking at 20+ mana to readily cast pardic firecat. Also faithless looting seems a viable way of getting firecat into the yard without casting him.
Obviously this is practically off the top of my head. I don't think there are quite enough creatures, although I have high hopes for Gathan Raiders. There's enough draw/ filtering spread across the creatures/instants/sorceries to find what you need. I'd also find some room in there somewhere for Searing Blaze. That card is nuts.
It's nice, but the random discard is kinda lame. I've seen people put it to good use though. Don't forget, if your opponent has 3 cards in hand, they draw 3, then discard 3 (among the 6 in their hand). Odds are it won't hurt that much.
I do like the deck you posted, my only concern is how quickly it would get a kill. I have never played a burn deck, and the closest thing I think I have to it would be an infect deck because of the quick kill. I just don't want this thing to stall out.
I did some printing of the cards and just stuck them in sleeves to practice before I buy it, and it runs quickly enough but I have no experience vs white weenie or delver players with this deck, I only played other casual decks, like stompy and ramp.
Ah that's fine, and I apologize. I didn't mean to put pressure on you.
From my calculations, if you aim every burn spell at their face and attack without being blocked, you can kill them in 5 turns. Not bad. Obviously, this will never happen. The strategy will be more like burning creatures out of the way so your raiders can get through for damage.
Changes I would make to the deck: -1 Mad Prophet, +1 Gathan Raiders, -2 Wild Guess, +2 Burning Inquiry.