I have just recently re-added BW into my build for UB actually. I'm still not sure where to put it, but it definitely has its place. For comparison, here is my old build:
- Spit
- Diseased Claws
- Ooze
- Spit
- Grasp
- Ooze
- Spit
- Ooze
- Save
- Spit + ooze
I am a very strong supporter of the Blade of the Serpent for this build, though I know a lot will use blood of the fallen too. (Which isn't strictly worse or anything, just another option at this point).
Now, what I've noticed as I play this build, is that while I'm attacking someone, with spit/ooze/grasp tricks flying around, that activating the Blade gives me basically infinite mana for the duration of the combat. Also, any activated ability can be used with grasp to give you a bit of extra time(Stops the damage, breaks the 'stun 'on you, but not the target). So, what if I insert a Bestial Rage in there instead of Diseased claws? Of course, it isn't worth skipping ooze for early BW, so I'd change my order a bit.
- Spit
- Ooze
- Save
- Spit + Ooze
- Grasp
- Bestial Wrath
- Spit
- Oooze
- Save
- Spit + Ooze
The point is that if you are in a 10 second Mana Splurge due to the blade, the mana cost of the Bestial Wrath is significantly negated, meaning it is just a 25% boost to AA damage for a while. It also allows you to pick up the line a lot faster once you get to the end game. Now 11-15 could look like this:
- Beastial Wrath
- Beastial Wrath
- Beastial Wrath
- Save
- Spit + Beastial Wrath
Which has some perks to it. No doubt the level 15 variety of BW is pretty astoundingly powerful. Longer duration, and INABILITY TO BE SLOWED are amazing effects. It also allows you to scale up your AA damage much faster than others during this period. My other build used Inner Beast up to Acclimation, but I have to say that BW 4 at level 13 giving 55% more damage, is a lot better than +10% attack speed.
Anyhow, I've tried this only once or twice, and not in close games (Easily won them.. but generally against poor pug teams )