WRT Eviscerate and Ruthlessness, It is Ruthlessness that is triggering the combo point to be added, so nominally Eviscerate would be excluded. if you can find evidence that Eviscerate should be included, by all means post it up on the github issue register and we'll take a look at it.
To be more precise, here's what happens:
Eviscerate -> trigger Ruthlessness proc -> chain Ruthlessness spell onto end of Eviscerate so it will be cast after ability is complete -> Ruthlessness spell adds combo point.
It's one of those things where you need to stop thinking like a human, where you can conflate stuff together no problem, and start thinking like a computer (you know, the the thing the game is run on).
Verbogeny is one of many pleasurettes afforded a creatific thinkerizer.