Long-ranged is the ability to attack an opponent from very far away. Coco Nebulon can lengthen her rang of attack by buying her Ball Lightning and then to be able to hit from even farther away by buying her Conducting Gel upgrade for her lightning ball.
Raelynn's Snipe ability has a very long range, which can be further upgraded
Lonestar's dynamite can bounce a fair distance away from him, and his Bull can be upgrade to last longer and therefore push/run farther away from his team.
Skolldir's Earthquake can be upgraded to have a medium-long range.
Derpl's Nuke ability can travel a fair distance before exploding.