Quote Originally Posted by al-bhed_kid0827 View Post
I summon them whenever I ... don't wanna fight through an area.... find a place that has lots of monsters that give lots of EXP, and summon. You get double the experience. Combine that with the Embroidered Tippet, and I bet you'd be gaining levels in no time.
QFT

The Espers are great for areas where monsters gang up on your party.