Knight
Spell One: Lance Hurl: Hurls a lance at the enemy, doing X damage and a possible chance to kill them on hit (very low chance). (a javelin missile or something like that)
cooldown: 8
Spell Two: Run to Defense!: The knight is not easily broken in his mind, and his physical strength says the same. If he must give his life up to protect the helpless, he will. Increases armor by X for X seconds. Also gives 1/2/3/4/5/6+ permanent armor. (the footmans "defend" effect?)
cooldown: 8
Spell Three: For Freedom!
The Knight is induced in a righteous frenzy, fighting for the cause of his people and king. Increases attack speed by X and movement speed by X. Also increases damage by X (i don't know what speeds and damage you want so i put them as X's) (make his hands glow yellow with faerie dragon missile instead of normal frenzy)
cooldown: 10
Spell Four: Cry of Hope: The Knight does not despair in hard times and tries to keep his allies this way too. He lets loose a encouraging cry, bringing hope to allied units and renewing their strength. Heals for X and increases attack speed and damage for all units around the knight in a small/medium/large radius for /8/10/12% (normal roar i suppose)
cooldown: 15
Artificer:
Spell Four: Electrical Overload:
Releases a overload of electrical energy, dealing X ammount of damage to all units around you in a big/medium/large (and stays large for next levels) area for 2/4/6/8/10 seconds. (an edited ulti of crypt lords with lightning balls perhaps and without the life steal?)
cooldow: 10
Spell Five: Unstable Pulse
The Artificer combines a shocking sphere and pulse sphere to create an unstable creation. It creates an electrical explosion, dealing X damage and stunning for 3 seconds. Then it releases a devastating wave of lightning, bouncing to 5/6/7 targets for X damage. Finally, the sphere overloads and explodes, dealing X damage and continuing for X damage over 5/6/7 seconds. (electrical explosion = the purge effect, electric wave = chain lightning, the last one a giant chain lightning hit effect or a farseers missile, or both

!
cooldown: 15
hope this helped!