I would cut
Cartographer's Hawk and
Demonic Tutor.
Carrier Thrull,
Pawn of Ulamog,
Pitiless Plunderer all belong in the Ramp category for this deck. They ramp you for doing what the deck wants to do. But
Cartographer's Hawk not only requires that it attack, but also that it
deal damage to the player AND that the particular player that it dealt damage control more lands than you. Your deck doesn't want to concern itself with all that nonsense.
And then my mantra is: if you don't know what to cut, cut a tutor. You have a ton of duplication. You have 6 sac outlets. You have over a dozen different things that give you benefit when a creature dies. With all this redundancy, you'll never need to tutor for anything. Either cut a tutor or cut something redundant.