Heyo new beastmaster here who recently leveled from 1-25.
1-12 ronfaure (pretty standard boring stuff)
12-15 Konschtat peninsula (meh camp until crabs near the lake then it becomes pretty alright except for that one sheep NM.)
15-18 Tharongi canyon (pretty alright camp in terms of charming dhamels and proceeding to kill yagudos and other dhamels.)
18-24 Carpenters landing north sandorea entrance (absolutely brutal at lower levels in the sense that everything aggros except pugils and flytraps but once you get the ball rolling at 21-22 the camp is swift sailing from there on out. Charm beetles to fight funguars for exp, charm non plant things and have them fight wasps for suicide exp, and send 2-3 pets at orcs for tough exp at the lower levels. Once you get to level 22, then you can charm flytraps and then you will want to murder everything though keep in mind of beetle/wasp aggro as well as water/thunder elementals when casting healing spells)
24 Carpenters landing pond entrance of Jugner forest (This area is fairly friendly at level 24 in the since that it seems that only funguars aggro while the beetles and wasps do not. Tigers appear to be even match-tough and flytraps are definitely tough so it might have potential to level higher but I will need to test the area when I hit level 25. At this area, charming beetles to fight funguars seems to be alright exp if you like killing a chain of decent challenges.)
25 Carpenters landing pond entrance of Jugner forest: At this point the Tiger camps and Flytraps become more accessible to being charmed and there are plenty of even match and tough enemies to fight at an alright rate allowed me to get a exp chain of 3. The only danger in this area are the two tigers, weather elementals, and ghouls during nighttime which you can also kill for more even match/tough exp though watch out for waterga.
http://i.imgur.com/27BEt9H.jpgWill probably update this post as I level further.