i also have a solid team for beating Garden of Dismay X Without problems:
Piece of mind eddie (purge + titan shield)
Green Lilith (angel)
Green Lilith (revive, or what ever these are called that you can get in GoD X)
Gunner Dog (echo or crit, both works)

The gunner dog is the only one that sometimes dies at the end, but it works.

Keep in Mind that i have pushed Sentinel Live Relics to 10, Sentinel DEF, MR, ATK, MAG and Specil on 3 and going.