mmm....... the gambler seems like more of a normal character rather than gamble O_O like in my opinion the gambler if the description fits it should go like Ability 1: Card Tricks: Throws a barrage of cards at enemies stunning them for 0~10 seconds in 0~500 radius from the target for -x~x(on this example the x has the same value like... -10 to 10, -1 to 1, etc since it's really a gamble it should be a gamble >_> to see if it'd heal the enemies or damage them in real life gambling doesn't workout very often so yup :P) * agi
Ability 2 seems like a gamble but kind of useless as well O_O
Ability 3:Roll the die: Rolls a Magical Giant X-sided(this time x should be an even number) Dice at the enemies that changes the weight with the number rolled either flattening them or making their feet lighter with chance of 100% critical hit for the victums or their enemies.
Dice lands on - number =(all numbers after the = sign will be positive) that number * X% haste for the enemies in the area of effect with healing that number * agi, and grants them number rolled x normal damage critical hit for number rolled seconds
Dice lands on + number = Stuns for the duration of the spell for the enemies in the area of effect dealing number rolled * agi damage and makes them take number rolled x 100% damage for number rolled seconds.
as for the ultimate... I can't really think of what to say to that except that... yami-chi can't make custom models >_< he said so before >_< so you needz to make the cards for hims >_> personally i think ult should be like... 100% positive number rolls and double spell effects for some amount of time >_> rather than summoning something O_O but hey it's your idea, and ummm i just wanted to make the abilities fit the description of the character a bit more :P