no , BW at its final level, does have a defensive application. It prevents UB from being slowed at all, and early game it is amazing.
Unrelenting Wrath - a level 15 skill. If you manage to hit level 15 early game (when everyone else is levels 1-8) then it probably doesn't matter what you spec, in all honesty. Go nuts with whatever zany build you want.
Ooze is great and all, but I can get easily in the 336 damage at level one, with mard's hammer BW, and basic damage gloves.
With Mard's Hammer and Gauntlets of Brutality you would do 233 DPS. Rank 1 BW only adds 25%, meaning it adds 58.25 DPS to a zero armor target. Every DG has at least 8% armor at level 1. That means at best you're getting 53.59 DPS as long as you're in melee range, a whopping 4 DPS more than Spit, but it costs more mana, lasts 3 seconds less (meaning about 150 less damage total), and once people get scaled mail or nimoth's you're going to see that damage plummet pretty dramatically, it will actually fall behind ooze in DPS.
With Inner beast, he can mow down towers and demigods.
What? It's 3%-9% attack speed. Don't get me wrong, that's nice, but if you're mowing down towers that's hardly the major factor behind it, especially because by level 8 you get a passive 13% attack speed increase. You're not going from 100 to 109, you're going from 113 to 122, an 8% DPS increase. Again, it's a good ability and every UB should take it, but it's not a huge deal damage-wise.
Trust me man, look at my name, i know UB well.
You're joking, right? If you change your name will you forget how to play UB?