They are the best choice when you're not fighting a boss. They have slightly lower stats because they can hit a ton of enemies at once.
Go grab a Commando and attract a group of 6-10 alien dogs. Use the 60 crit buff, and watch them all die in seconds because of the aoe damage. Add gravity well + singularity into the mix and you have the official AOE warrior of Star Legends. And you can always switch to a rifle for minibosses and bosses.
Bookmarks