Solo Grind Spots??

Since i started this game a few weeks back ive been in parties, ive never really grinded alone( aside from the few occasions i was in AF and such by myself)

Alls im wondering is where is a good spot to solo grind in 7x areas. something that doesnt cost an arm and a leg to grind.

In my 70s I liked to grind in volsin outpost. I don't know if your def is high enough though.

Well ill try it out , Thanks for the tip