so i wonder as a level 950 with adept learner 863, stalker 230, librarian kicks in with doubler 1725 and i kill a carver
how much exp would i get?
I reckon 11,400,000. You didn't mention sacrifice so I've assumed 400 + distil. That is also for a 1-hit kill, so doesn't account for AS if you don't 1-hit.
*BUT* when I was doing these calculations on a regular basis I found I kept overestimating the amount of Xp I should get. I got partway through an RJEM-like analysis and decided the effects of elite hunter, stalker, lib (doubling frequency), overkill and arterial strike were all working according to the skill descriptions (and forum, in the case of elite hunter). That left me wondering whether AL underperformed with respect to the description - or whether it doesn't stack with some of the other bonuses; but I never got around to doing the trial hunts with different buff combinations and recording the Xp/kills to test this.
Anyway, if you have lib 500+distil, that becomes an average of 8,400,000 per kill, and so you'd need about 65 kills to get from 950 to 970
Hunting an SE to gain 20 levels does sound painfully slow, though.