It's hard to call the
kunark express off the beaten" path, but it would be different from what you've been doing. If you're a non-iksar you'd need some support. Ports/binds/rezes etc.
Level 22 I'd recommend Forest Giant Fort in Warsliks Woods up until 25-27 or so then head to the "ledge" camp outside the sarnak fortress in LOIO until 30.
Level 30-35 sola is my go to. Level 34-38ish maybe go to crystal caverns. There are 3 camps past the coldain town with Stalag Terrors, spiders, and geonids.
The 40's have always been a grind for me. Solb/CoM unfortunately.
50's kedge keep and the hole are great.