Where are some high level chokidai that will agro for the slayer? Also, how is Karnors for this? Not interested in the CR Puma cave hehe
The levels of the mobs do not matter for Slayer achievements. If you are trying to gain experience while also doing slayer stuff, you'll have to be more specific about what level you are, if you are a paid account, what server you are on etc etc. There are Chokidai mobs in many zones from the expansions: Ruins of Kunark, Ring of Scale, and Empires of Kunark.
Just spent the last three days in Chardok (EoK version). Most mobs don't see invis, except the chokidai, golems, and a few scattered undead. The mobs in there still give XP at 120. Just invis, run through, and stop when something agros. It's probably a chokidai There's also an area which has quite a few chokidai in it. If you hang out there, you'll have quite a few spawns to grab, as well as a chance at two names (one chokidai, and one trainer).