The most easy spot with basin is on Dwacatra on Kazordoon. To find the place follow this map:
If the door is closed, you need the Key 3802, you cand fin it with the "Emperor's Cookies Quest".
Here you can find:
Dwarf
Dwarf Soldier
Dwarf Guard
Orc Shaman
Orc Berserker
Minotaur
Minotaur Archer
Minotaur Mage
Bride of Night
With level 30 can do it without problem.
Also you dont need premium account.