Quoting Milskidasith, reply 13
Err.... so? Ooze is better for 2v2's than spit is because of the huge debuff it has. Spit is awesome for 1v1's. Ooze is great for 1v1's, 2v2's, 3v3's 4v4's, and basically any situation thanks to its huge debuff.
Also, plague as an AoE? Seriously? Taking 30 seconds to not kill a basic melee creep seems useless to me. Ooze will kill him in 3.
Ooze UB has: a huge debuff that helps when you and your ally are fighting together (it's the power of two demigods AA's versus the power of 1.2 demigods autoattacks), hits both enemies, and requires no mana items, so he can tank very easily. Spit UB.... can harrass one demigod, requires at least one mana item and probably two if you want to spam grasp as well (which puts you behind me in HP, which means Ooze will win the fight), and with the way I build him, he's got the speed debuff and a stun, which is great for helping with your team. Spit UB.... well, a lot of different builds do a lot of different things, but they all take spit so they are all underwhelming compared to Ooze.
Also, a plenor battlecrown? What? That's two spits, one spit and a bit more than a half at max level. Without any other mana items, you won't have enough regeneration to use spit as often as you like; with a spit build, you either need a mana favor item or vlemish + plenor to have enough mana to always spit.
Whether it's 1 on 1, 2 on 2, or any other combo, Ooze is good when you actually get into a protracted melee fight with your opponent. That's not very common though. It usually happens against Sedna, Erebus, Oak, or another Unclean Beast. And it only happens when your opponent has the odds stacked in his favor or vice versa. In many cases Ooze doesnt really help all that much because either you or your opponent just gets ganked within a few seconds.
It's just rare that decent players sit there and scrap it out. If the opposing team is mostly made up of Rook, Torchbearer, Regulus, or Queen of Thorns you are not well advised to slot Ooze. It's not going to help you that much because those players are not going to sit around trading punched with you unless they are idiots. Against an Oak and Sedna team, Ooze might actually pay off. It depends on the situation, but Ooze is less commonly useful than Spit is overall.
Its interesting that you don't seem to understand how the Plenor Battlecrown works either. I play UB very well and I rarely need anything more than that item. Spit isn't the only attack you have. It's just a useful harrassment tool. Most damage is done with melee autoattacks and Spit is just to finish off a fleeing enemy or to wear someone down at the start of combat. Anyone who tries to 'always Spit' as you suggested still has a lot to learn about how to play Unclean Beast.
Ok, let's see.... UB, with no speed items, has 6.93 speed naturally (with skills) and his opponents have 90% speed. Nobody can actually stay out of melee range unless they are retreating out of the lane and behind towers, which means that I won anyway (and at later stages of the game, towers are not very good deterrants to somebody with over 10k HP with a sigil of vitality). A person would have to be stacking speed to get out of a melee fight without me being able to continually hit them (or have Jouneyman's Treads, or buy a Wand of Speed before I get one). It's just absurd to assume that you can't keep somebody in melee range as UB, especially since you play him.
Rook: With towers, he's annoying. Then again, with towers, nobody except maybe Regulus can actually do much to him early game, but he's stuck in one spot and tower's scale horribly, so it's not really fair to say that UB can't beat him, because nobody else can. Without towers, Rook is free EXP (until lategame when he can reliably boulder roll + hammer smash and his poisoned arrows can actually keep UB away). And seriously, you think a Rook can get away from UB? With a Swift Anklet, he's still .09 slower than UB naturally, without any buffs. With UB's buffs and speed debuffs, he needs boots of speed and a Wand of Speed active just to escape an UB without any speed items. Pretty unlikely.
TB: Squishy, reliant on spike damage that doesn't do well against UB with HP stacking, not particularly fast in either form (Ice has some good ways to keep UB away, and a well played Ice + fireball TB will be able to spike UB down pretty well [two full comboes, though staying for both is unlikely], but fire really has no chance of keeping UB away.) And once again, if they flee, so what? I've pushed them out of the lane, I win.
Regulus: If he goes mines, he might get away. If not... he's not getting away without burning a favor item and item slots on speed items.
QoT: Besides bramble shield, she doesn't have much to get away from UB with. And Bramble shield works better as a counter against Spit anyway, since it still absorbs the damage and she has a better mana pool for shield than UB does for spit. Against Ooze, she will get pushed out (lategame; early game, an 800 damage spit is more useful, and really early game, nobody can do anything to shield spam besides hope she runs out of mana.)
None of the Demigods you listed as tough Ooze matchups are tough, at all, for UB to hit.
And also, Oak is by far the person I hate to see the most as an Ooze UB, because his spirits, even if they aren't particularly damaging (and built well, they can be REALLY damaging), have a ton of HP and are just plain annoying. Oak, when played badly or as an assassin, is cake for UB though, and Sedna is pretty much cake for an HP stacking UB, especially once you start grasping her heals.
Really, you should have mentioned Erebus; he's probably the only person where spit has an advantage, because if he plays without mist (which I tend to do; full bite, batswarm, and mass charm assassin build for me, though I might start switching out my second point in poisoned blood for a point in Mist just for the nice benefits) then he can get away from UB (practically the only person who can, since he has the same natural speed and a big speed debuff and an escape skill), but Spit will continue to affect him unless he mists, which lets you run up and probably spit again (if he mists then swarms away quickly, you might not get one off though.)
Also, about Plenor Battlecrown: If you are going with a spit UB build, and are not spitting for damage, you will lose to Ooze 100% of the time. You need Spit to do damage; without it, your melee attacks are not going to do more than my melee + one slot more of health stacking + Ooze + attack debuff. If you are only spitting "for harrassment" it means you aren't going to be able to sustain yourself in combat... which is a flaw of your build. Only having Plenor lets you spit about 4 times before potting or going to the crystal at level 10. That is horrible. Flat out horrible. Even for harrassment, at that level it takes two spits just to start really hurting somebodies HP, so you will maybe push two people out and have to go back yourself to restore your mana, not to mention anybody fighting you in 1v1 combat will easily be able to push you out. If you rely on AA damage as a Spit UB... then you are playing him wrong, and have no reason at all to say that Ooze UB, who is better at keeping people within AA range (lots of spit builds skip diseased claw for some reason), does more damage in AA range, and takes less damage in AA range, is a bad idea.