While I am not in the currect beta, I have pre-ordered the game and hope to get into the next stage of the beta process. That being said, I don't know much of actual game mechanics and skills, but I did come up with an idea for a Demigod. Here it is...
[Name]: Danesum Thunderfist
[Type]: Assassin
[Skill Type]: Now there are only 4 skills that I have thought of, but came up with conditions to use some of them. Generic skill name will be in parenthesis. I will explain in more detail the conditions/mechanics of skill usage in the comments section.
1. Thunderfist (Lightning Strike) - Basic and first skill. This is the backbone to the other two attack skills. Medium range single target attack.
2. Path of Thunder (Chain Lightning) - Second attack, only usable after "X" amount of Thunderfist casts. Medium range and the damage will be 150% of Thunderfist's damage, to the first target, then damage is 100% for 2nd target and reduced by 15% for each additional target hit.
3. Fist of God (Lightning Bolt) - Third and final attack, usable only after "X" amount of Path of Thunder casts. Long range (I'd like it to be infinite range, so you could possibly target any Demigod anywhere on the map), single target, cast time dependant on range (or just a longer cast time like 3-5 seconds), and base damage is 400% of Thunderfist.
4. Flash (Teleport) - The fourth skill would be a teleportation to get in or out of battle. Medium to long range. Obviously meant for escaping battles, but with skill augmentations (which I would have in skill tab instead of new skills) it could be used to teleport next to your victim.
[Apperance]: Danesum Thunderfist is a lightning incarnation, so his character would obviously have surges and crackling of electricity showing randomly around his body. As for his physical appearance, I picture him more of a Bruce Lee looking guy, shirtless and ripped, wearing those martial arts pants (white) and those slipper shoes (black). He could have Goku (DragonBall Z) style hair (White though), and his eyes could have lightning flowing out of them. The lightning attacks would come out of his palms, so electricity could flow from his body to his hands when he casts. For the Fist of God skill I'd like it to be instead of pointing his palm towards the enemy, his whole body becomes a conduit of electrical power and the attack flies into the air and finally crashes back down with devastating force onto his target.
[Role]: Caster DPS
[Comments]: Now for the mechanics of casting the second and third attack spells, I came up with a charge system (similar to combo points in World of Warcraft I suppose). The premise is that in order to cast his 2nd spell, there needs to be say like 5 charges built up, and to build charges you have to cast Thunderfist multiple times. Likewise to cast his 3rd spell (strongest) he needs say 3 charges of Path of Thunder. I don't know how cooldowns work yet, so this might not be possible at all, but the charges could last 30 seconds before beginning to diminish. This way the Demigod must constantly be in combat so that he can use his stronger attacks do hurt and kill other Demigods.
As far as the skill tree goes, I know some people might say "wow 3 atk skillz is teh suck," but in the skill tree there could be various augmentations/upgrades to each skill. Like for the first skill, Thunderfist, there could be a Damage Increase, Range Increase, and possible a final upgrade at higher levels that actually makes the skill transmit 30% of its base dmg to enemies between you and the target. For the 2nd spell, there could be upgrades to hit more enemies after the first, increase damage of subsequent targets, or even to "fork" the first blast, sending out 2 or 3 Path of Thunders with its chain lightning effect. For Fist of God there can be damage upgrade (making it very powerful) or even different effects when it hits, like a small blast radius making it a powerful aoe, or giving it a stun on the target with a shock (slow) to nearby enemies. Of course you would not be able to get EVERY upgrade, so even multiple Demigods would have vastly differating skill effects.
[Passive Skills]: This is a list of a few passive skills that could be attained through the skill tree.
Lightning Manifestation - Since Danesum Thunderfist IS lightning, he has a chance to evade all incoming attacks with his obviously lightning fast reflexes.
Fearless - An aura that effects nearby allied units/Demigods that increases their attack speed and skill recharge times. Does not effect Danesum Thunderfist.
Overload - The power of lightning is too much to be contained in human form, and periodically "leaks" out causing damage to nearby enemies. Pretty much a small damage aura that just helps add some DPS.
Thunderfist Heritage - More than just a name, this passive skill increases his melee attack rate (Did I forget to mention he would be a melee caster? haha)
Thats all I got right now. Can't wait to play the game.