The reason you seem to have a lot of problem with card draw is probably because of how high all of your card draw is on your mana curve. Also, you do have to sacrifice creatures for some of your draw, and that might be good for Ukkima, but ulimately you really don't want to keep casting the Whale Wolf a million times. I would suggest some cheaper card draw spells like
Night's Whisper,
Sign In Blood,
Treasure Cruise (which can be delved), and maybe some X Spells Like
Pull from Tomorrow or
Read The Runes. This will speed up your
game plan quite a bit! Also, if you want more repeatable card draw,
Mystic Remora and
Mirrodin Besieged are great options, and one of them has an additional win-con stapled to it! If you want to stick with higher casting cost for card draw,
Ambition's Cost and
Ancient Craving get cards into your hand at a pretty fair price. If you don't want to be losing so much life, use more blue card draw effects, like
Windfall or
Fact or Fiction. Hope this helped you out!