It would be insanely convenient if you were able to have templates for selecting your monsters for battle.

For example,
My common offense is Tiaga, Thetys, and Goldfield for PVP, but I also sometimes use Darmith's Bodyguard, Thetys, and Firael.

It would be really nice if I could turn these into battle templates and then just select that template to switch my monsters from Tiaga, Thetys, and Goldfield to Darmith's Bodyguard, Thetys, and Firael.

This could be handy for Wars too because if you happened to have a template that matched the restrictions of the war it could be used instead of the typically bad selection of monsters it does automatically.