Dude 3

Lightning character with a possibly autocasting DoT. The DoT might debuff the opponent in some other way. Has mana and the following abilities:

Passive that regenerates health for each unit the DoT is on.

Chain Lightning passive. Every time you attack a target without the DoT, you gain a stack, up to the number of your ranks in this skill. When you attack a target that has the DoT, you get a chain lightning, with damage and targets scaling with the number of stacks you have.

Lightning bolt from the sky with a small delay. Does damage, and radially knocks back units with the DoT on them.

Semi-ultimate summons a dragon with a lightning attack. Its autoattacks apply the DoT.

Fifth ability TBD, but possibly some damage that scales with number of people under the DoT or some such.