Alternate Everquest

10-20 (post armor questing) befallen is fun
15-40 can be done in unrest and is great exp but it can be tough there without a group.
15-30 in SolA can be fun- tons of enemies
30-50 in SolB is great and the exp is incredible

50+ group zones in order of difficulty as I see it:

Veksar > Hatchery > Taka > Cazic Thule > Corathus > Devastation > Castle > Paw

Don't try paw for leveling... or anything. It's just... brutal.

Make sure you do your noob armor quests before 20 then start your sol ro quests at 30-35.

Trying any 50+ zone without a full set of sol ro gear + farmed off pieces or friends = a bad time.