Well in DM, there are no limits to what you can use. Since you asked for Ulu Watu, I'm guessing it's for T2.
Go for Stanley Lulabee Miss Lulabee Zack Shayna Buck and Hikiyousan.
When you get Eyrik, try to fir him in as well.
For T1 DM,
Try Gaia Janice Nanook Gabrielle Wee Lee Buck Shayna Taigo
I got all of them and so duz scorpio
A quick way to level is to ether train characters or play in deathmatches.
As a fellow Ulu Watu fanatic and lover i can tell you that they are really built well for T2 play. That being said, you're best bet would be Deathmatch, as allready stated above. I have a preset that works really well. I'ts deleted and if the link didn't show then its called Ulu Watu TO THE DEATH II. Feel free to message me any time, the Ulu Watu are my pride and Joy