the only issue with a ton of mana elves like priest are just too slow. when you draw into them mid combo they are useless unless you have nettle or the other tap 3 elves guy. birchlore ranger gets you the colored mana you need, and ranger speeds up the deck as well. instead of bane fire, grapeshot is just as good or better. and summoners pact and skullclamp are some cards to look at as well.
Why is that? He runs Concordant Crossroads for haste, so he should be able to tap said mana elves immediately, no? The lack of red mana was probably overlooked when he made his mana base.