thats a good question mooncalf, its always been my finding that you can never have too much mana too fast... unless you draw 7 lands opening hand.
i'm suprised at how hard the deck is to play, i usually try to focus on getting the blind hunters out and then blink them a few times. but then at the same time mulldrifter is great with blink too, and then theres ravanous rats... and then the warrens the only real card that doesnt work well with blink in the deck is the faceless butcher once you play him you pretty much want to treat him like one of the oblivon rings.
so my delemia is:
do i focus on blinking
blind hunter
mulldrifter
ravonus rats
warren pilfers
when i play the deck i get the feeling that the mulldrifter takes some of the momenton of the deck away. card advantage is great but when you have a hand full of warrens and need room for the cavarn harpy it seems there is too much going on. so i'm thnkin of adding in either more removal as in echoing decay or maybe some distruption like counterspell.