User blog comment:FairyRaven/Fairy Tail Chapter 377, 378: The Sky Dragon's Rage & Friends Forever, Review and Commentary/@comment-7418318-20140328112721/@comment-24066070-20140328161514

Dora can win if he would throw shurikens at Jackal. They injure him, then turn into bombs and explode inside Jackal.

Dora would be a good char to eventually take Jackal down, since he witnessed him destroy the MC and thus could seek revenge.

However, I see him fail to do so unless he learned some ranged magic as Nick said.