Vengence 100% Rally?
To start with: I do not have this trait (not even passed level 40 yet).
Despite that, I rallied at random during Vengeance after a slaughterfest. I thought maybe if you killed enough you would rally and that the tooltip wasn’t accurate, but the next time I tried it I never rallied.
So, I’m pretty sure there’s a bug with Vengeance.
In my experience, you rally about 40-50% of the time without the trait, so it seems that it’s either bugged or the tooltip is wrong (should say +10%).
There’s also several threads about this issue fyi.