Trickster A unique support hero

I was thinking about a dota 2 hero who's entire play style would be about guerrilla warfare. Meaning that they frighten enemies by making it look like there are more enemies so they would be more intimidated.

Name: Trickster (Int hero and throws throwing knives for basic attack and part of the Dire)

Str: 17
Agy: 17
Int: 21

Damage: 63 Movement Speed: 300 Turn Rate: 0.6 Health: 473 Vision: 1800/800
Atk Range: 380 Base Atk Time: 1.7 Missile Spd: 950 Def: 1+ 2.43

Trick-Up-A-Sleeve
Passive
There is a 20/30/40/50 percent chance to steal a buff from a enemy hero (via basic attack)
Everyone should know THIS trick...

Multiple Illusions

Spawns 2/3/4/5 melee creeps that have two times the health but only mini-stuns when attacks.
Mana cost:100
Cool down:10/11/12/15
What do you mean they are only illusions?

Magic Cards
Unit Target
Throws a playing card at the target enemy dealing 80/120/150/185 magic damage while giving the opponenet the Astonished! debuff (Inverts the opponents movement controls)
Lasts: 2/2.5/3.5/4.5 seconds
Mana cost:130
Cool Down:15/16/17/18
Pick a card,any card, it dosen't matter what card it is as long as I throw at your face!

Final Trick
Global
All allies are turned invisible for 1/2/3.5 seconds and at the end of that time, an illusion of that hero is spawned beside him/her. The illsion takes 50% less damage, and has its health incresed by 25%, but cannot use abilities and its attack is defreased by 60%. Illusions last for 3 minutes or until death.
Mana cost: 150
Cool Down:120 seconds
And now for my last trick...

Lore
Sorif was born in a small village in the north. Being an infamous trickster at a young age, he was nicknamed Lokisyn, after the god of tricksters. Later on when he was older, Sorif became a very intelligent battle strategist, and after battles he did magic tricks to past time. One day, in the midst of an intense battle, Sorif was captured by the enemy. Because he was captured, his village could not defend without Sorif and was burned to the ground. After learning this, Sorif went mad with rage, using his illusions and tricks to completely demolish the army and the army's hometown. After calming down, Sorif regretted what he did and decided to travel as a traveling magician for the rest of his life, that is until he met a military know as The Dire...

Seams really OP. That ult is just ridiculously good making illusions of your allies that are even harder to kill than your allies. The cooldown change on Magic Cards makes no sense, it goes up as you level it. the Multiple illusions makes creeps that mini-stun, like holy hell that is good we are talking 0.1 seconds per hit up to 0.25 seconds of stun per hit basicly keeping people from running away, also (not sure on the duration of the illusions) you can pre cast them before a fight and as a hero like Enigma drops a Black Hole, you can just stop it instantly even if he has a BKB.