If you want more consistency put in like four more mana rocks. I'd suggest getting rid of some of the enchantments.

So yeah, apparently the original Oloro deck had some mana rocks in it. God knows where they are.

Angelic Chorus and Test of Endurance?

Wait a minute... Test of Endurance is a thing?... AND ITS ONLY 5 DOLLARS?!?!?!?!

I'm planning on pulling out Sharding Sphinx, Sydri, Galvanic Genius, Ensoul Artifact, Thopter Spy Network, and maybe Steel Hellkite for some new cards, including the old Dromar's Charm I have somewhere and that one demon version of Sanguine Bond, but if anyone has any good suggestions for replacements, I'm all ears. I might be ordering some cheap cards for my commander decks soon, so some of my ideas include Drogskol Reaver, Chalice of Life  ^Flip, Isperia, Supreme Judge, Words of Worship, Debt to the Deathless or Azorius Charm, but please tell me if you have any better ideas.

Just to confirm though, before anyone asks, I'm not pulling out Ashiok, Nightmare Weaver. He/She was my first planeswalker and it would sadden me deeply if it wasn't being used. Plus, its just a fun card.

I don't think you want Words of Worship in here. You always gain a crap ton of life so I don't think trading card draw for life gain should be something you're looking into. The card draw that you're looking at is pretty good, especially the Reaver. Azorius Charm is definitely a card that should be in here. It screams Oloro. Also, you might wanna take out Crawlspace. I know it's a decent control card, but now that there's not much artifact mechanic in here, you should put in something that give you more control. I'd recommend a board wipe (Supreme Verdict is nice) or just something else that is more versatile and doesn't let your opponent swing at you w/ a single deadly creature.

Other cards that you might wanna take out: Disciple of Deceit, Angelic Accord, Serene Master and Wall of Reverence. All of these cards are kinda passive and need other components to really work well. Seriously, though, you could do w/ some more really powerful spells. You've got a ton of creatures in here. When you're running Esper and you've got the same amount of creatures as my Anafenza (which is green based) you've got more than enough creatures. Like I said in the last comment: board wipes, counters, broken blue and/or black cards (trust me there's a ton of them). Anyways, this deck is already good, so just don't make it bad. Yay for Oloro!

Absolutely not pulling out Wall of Reverence. Absolutely not.

Honestly, pure lifegain for the sake of lifegain is, to me,, unfun and weaksauce. You seem to have a lot of great cards for digging, draining and drawing but for what? If you pull all of your pump & powerhouse stuff late game, and used up all of your protection then you are 1 board-wipe or disruption away from blowback from your opponent(s) who no-doubt have been building their own board-state to stop any of your tactics. Though take my opinion w/a grain of salt bc I also thought I was being original when I named my deck :P http://tappedout.net/mtg-decks/14-08-15-oloro-milks-favorite-cookie/

A couple suggestions: You've got a pretty high average CMC. I would recommend cutting out a few of your six and seven drops. I'd say Vish Kal, Blood Arbiter and maybe Teysa, Envoy of Ghosts could go. Then Treasury Thrull and probably Kothophed, Soul Hoarder and possibly True Conviction could also be pulled from here. Then if you wanted to keep cutting, Prognostic Sphinx and maybe also Sunscorch Regent and Dark Petition could go. Then if you STILL wanted to keep going, I would remove one of either Sunbond or Cradle of Vitality. After that, it doesn't really matter. Just try and keep in mind that you want your avg. CMC to be lower when you mod this deck. All of the cards that I mentioned should be replaced with lower costing ones.

The biggest problem is that a lot of your really expensive cards are creatures, which, you don't NEED to win in this deck, but a lot of them certainly help. So you might also consider adding a couple more lands or mana rocks to get more consistent land drops and mana acceleration.

Anyway, good luck building.