I suggest you get all of the GF's then. They help a LOT! I had everyone at level 16 and only had diablos and the other gf's you draw. I leveled everyone up, got the gfs and went junction mad!!

Here's another tip: Go to the Island Closest to Heaven/Hell and use the Enc-None ability. Keep drawing from all of the draw points there until you have 100 ultimas for everyone. They fill up fast!