Reduce clunkiness by adding ramp, card draw and tutors.

Ramp like Skyshroud Claim , Birds of Paradise , Oracle of Mul Daya , Burgeoning , Exploration

Card draw like Phyrexian Arena , Necropotence , and fixers like Sensei's Divining Top

tutors like Demonic Tutor , Vampiric Tutor , Diabolic Tutor , others

I agree with ChiefBell. I'd also try to lower the mana-curve whist applying some of his suggestions.

And since you are running Karador, Ghost Chieftain , perhaps try out Jarad's Orders and Survival of the Fittest ?

One of my friends runs an incredibly consistent (and all foil) Karador deck and he uses many of the cards you do, but I'll just leave some of the not so obvious ones here.

Deathrite Shaman - excellent utility creature

Saffi Eriksdotter - protects creatures you'd rather not die, also goes infinite with Reveillark and a sac-engine

Aura Shards - you are a creature deck, so putting creatures into play with benefits is never bad.

Elesh Norn, Grand Cenobite - completely hoses other creature decks.

I agree with JWiley, Saffi Eriksdotter is great in Karador.

I'd probably tweak a few little things, I'd swap out Animal Boneyard for a Miren, the Moaning Well - a little tougher to get rid of and frees up a spot to put something else in. I'd got with Mortivore over Lhurgoyf lose 1 toughness, but gain regenerate.

Spike Weaver can be really annoying in Karador as well.

I also played Riftsweeper and Pull from Eternity in my karador to get back those exiled cards.

Please consider Sakura-Tribe Elder . It blocks, ramps, and is easy to recur from the yard.

Lord of Extinction loves him a Karador deck

You realy, really need to be running ramp in a deck with this amount of 6+ drops.

Offer me some good cheap money wise ones than please. $5 or less (Excluding Oracle of Mul Daya I've been meaning to get her for a while.

i said Skyshroud Claim , Birds of Paradise , Farseek .

There's also Cultivate

Nature's Lore

There's no way you want Carnage Altar when you could have Greater Good . Screw the prices it has here, you can easily get one for $5.

Farseek , Cultivate , Rampant Growth , and Kodama's Reach are all good cheap ramp spells.

I also like Explosive Vegetation and Boundless Realms .

I don't think it's your CMC that's the problem (you're barely over 4 average). It's thenlack of ramp. ChiefBell, MattTheNinja and ozzar pointed out the best ones. Any (preferably all of them but at least 4 or 5) should go in. It really makes a difference.

Also mana rocks like Gilded Lotus or Thran Dynamo can help with the bigger guys and give you mana to spare. Also the signets in your colors (Golgari Signet , Orzhov Signet and Selesnya Signet for reference) are cheap fixers that help out too.