Sure they aren't for people soloing and low manning or random setup. But for the situations of parties on top of parties seems like a viable alternative. I find inner courts easier/faster to get around in. Need more of a return to old xp pting
As far as pulling your problem seems to be you were targeting the pseudo nms that rule each camp and not the ones titled apex. I've definitely pulled them and done testing on them via it (dvergr was actually how I was able to hit iirc like 60k cp kill back before we had 2-3x or half the bonuses we do now) they are of course the only one on each camp so have to often go around or kill other mobs to do it while if you were just cping you'd just kill the mobs around it just fine. Pulling the regular apex mobs don't think I've ever got other stuff there.
There is also the fact that like I said they are pseudo nms so while they don't check impossible to gauge they definitely have higher stats/lvls then the surrounding mobs, nm type name, and annoying monster types that are generally associated with nms and probably most importantly less ridiculous AoEs. For a blu getting spells yeah it might make sense but no cp party is going to target the Naraka instead of the skeletons around it lol. Long time ago when I first did it yeah acc was an issue (took me like 20 minutes to tribox the dvergr to death though there never was any danger) but just new/better gear it's gotten a lot better. While maybe higher level danger level and difficulty of the actually apex is below even T1 escha nms by a bit. I might go back up see how fast I can kill though sadly my best jobs for blowing thru lots of hp safely multiboxing without help don't need cp lol. Hmmmm maybe if I gear up my rng and have auto tank...