Batman/Gaslight

Good With

 * Catwoman/Arkham Knight : Catwoman's passive means all DOT that is affecting the enemy if she has used one of her specials cannot be rinsed by tagging out. Therefore Catwoman can use her special, then tag in Batman/Gaslight and none of the DOT will be rinsed by tagging out.

Good Against

 * Bane/Luchador, Batgirl/Cassandra Cain , The Flash/Earth 2 , Batgirl/Arkham Knight : All of these characters can tag-in with some form of attack rendered useless by Batman.

Abilities
Here are Batman's abilities.

Support Cards and Gear
Here are Batman's support cards and gear.