Raptors is seriously the only camp that supports a largish group. You can grind out the earlier ranks but a big party will quickly run the mobs out entirely...

Unless 1.18 really really changed respawn rates basically anything overland wears out super quick, making the available list of camps for grinding really small..

For a smallish group these camps work ->
27-29 <East of Camp Bald Knoll> <Buccaneers>
27-33 <Mistbeard Cove> <The whole dungeon more or less>
30-35 <Tam-Tara Deepcroft> <Black Efts>
35-41 <Clearing East of Treespeak> <Black Efts>