New to AC: Leveling spots for me?

I've chosen unarmed combat and really enjoy it so far. I've picked my way to level 18. I am using buffbots currently (but will likely create a character soon where I do not). If using buffbots, where would you suggest leveling starting at level 20 and upwards? I mainly solo fight as I haven't met many people in the game yet.

Sure appreciate your expertise.

Rindus...