23-28 goto the very top of the steps tower in Nek Forest where the skeletons patrol (All solo (23-25 level)).
Turn of auto follow mode, and park your toon for a few days at the right hand side :]
I got from 23-28 in about 2-3 days there, make sure to have about 3000 arrows if you are non caster.
You may attract a lot of attention from nosey people and probably be reported about 20 times (I got some tells from people asking why I spun 40 degrees perfectly, needless to say I was fast asleep - hehe

).
But so far GM's haven't bothered there !@#$%^&* and I was still parked there.
Of course I dont really give a !@#$%^&*, as a point of interest I had an Alchemist parked up in the same tradeskill zone every single day for about 3 weeks from 1-50 and ignored about 3500 tells asking why I am always there and if I was a bot, needless to say I'm still not banned - truth is you will only get banned if you are causing a nuisance to others, or using dodgy offset hacks (like the offset for running at 100mph

- otherwise they dont seem to bother their !@#$%^&*
