It's almost not worth posting because it's common sense, and I certainly can't say it's "my" build, but I don't see enough respectable cows out there so I thought I'd post it.
Seriously, if you are playing Oculus another way it's probably because this is EZ-mode boring or something, but please don't try to tell me anything else works nearly as well.
You don't really need a build order for this Oc, just remember two simple steps:
Step 1. Put all skill points in active skills 1, 2, and 4
Step 2. Do not put skill points into *anything else* until level 10+, at which point it really doesn't matter because you will be owning so hard even selecting morale won't hurt you. (I max out the passive lightning aura and go sit mid with my grunts but YMMV)
In a normal game you will hit 15 more with Occ than with most other DGs. Save at level 14 to max out skills 1 and 4.
Playstyle: Imagine TB. Remove his interrupts and replace them with a blink and monks. Give him limitless mana (skill 4 + Plenor and Vlemish) and high health. Now turn him into a lazy blind lightning cow. Voila! Now you know how to play this occ.
Do not melee Tier 1 DGs. Melee is beneath you, especially since Occ has trouble targeting when enemies get too close (this is a bug, devs). Learn to kite.
You are the flag holder for your team. Plant yourself on the Fort Flag early and level until your mana is endless and your health is respectable, then lock and go hunting at your leisure.
Unless the game is a complete roll by your opponents or you are playing with a vicious TB you should have highest score on your team because you are killing most of the grunts, doing the most damage, knocking down the most buildings, and getting the most gold and upgrades. If you aren't #1 on kills you should mosdef have top assists.
Spam your three skills. You get damage for blink at lift off and landing, so you can bounce on someone for double damage if you are feeling it. Be selfish with skill 4. Most players are just confused when you top up their mana, so best just to save it for yourself unless asked.
Start - Monks, mana pot
Curr 1 and Vlemish or Plenor (depending on playstyle)
The other one
Unbreakable Boots and Nimoth Plate
Standard TPs and locks and sigils throughout
*Nature's Reckoning + Chain Lightning + Lightning Aura is just effing salty. Seriously, taste the rainbow.
Counters: Rook, Minions, Squishies
Countered by: some Erebus, some UBs. Actually aside from gank teams I'm not sure this guy has a natural counter, what do you think?