Yeah, I thought it was funny cause it's a french server and at least half of you would click just to see what the hell "pourfondeur" was. Despite being fluent in French I honestly do not know what the hell a Pourfondeur is but there's no real better translation for slayer. The other translations of "slayer" would all be synonymous with "killer" or "murderer" so you can't really have people going around saying "i've just got lvl 85 murderer" now can we? :' /> so yeah...
Anyways, that aside this is a pretty solid achievement as I worked on it for about 4 weeks straight doing nothing but boring assignment after boring assignment. Believe me, it's a lot easier if you DON'T focus on the slayer exp because you get it at a very slooooow rate.
AND ALL OF THIS WAS JUST TO GET A FASTER KC AT SARA! (although I did get 79 summoning along the way and several millions to get some nice equipment and now I'm only 2 levels away from abbysal demons and 99 attack and got very close to 99 strength BUT STILL my main focus was doing this doing this just to get the kc at sara much faster).
So yay, now I can go slaughter Zilyanna a million times and believe me, I WILL get a solo saradomin hilt. It turns out, ironically, that solo Zilyanna is vastly superior to the other gwd bosses as you can stay there a hell of a lot longer. It's ironic cause I always thought of Zilyanna as insanely dangerous and soloing there would be suicidal (this was before spirit terrorbirds).