Well, I also did Yhoator Jungles personally, but according to Mystertour, the following places are good for someone of your lvl in a party of 6:
Eastern Altepa Desert
Castle Oztroja
Beadeaux
Davoi
Sea Serpent Grotto
Hope this helps ^^
*hug-hug*
Edited, Tue Jan 4 03:35:41 2005 by misatochan