The ease with which a solo character levels up is part of the reason I played the Den of Thieves party. Heck, Rumphy's good for some 6000 XP... so by yourself, that could be three or four new levels. With a party of six, it's one at the most.
I also prefer parties to loners. Just my nature, I guess [img]smile.gif[/img] I like controlling more than one person at a time (*looks sideways at the family...
*)