Implementing DNC/NIN system for AST Card

[Bobsmiaw]

While AST being overly busy is a pretty common complaint, I'd like it to remain somewhat busy. That's one of the things that pulled me to the class. Putting aside the question of balancing cards with the loss of AST's own damage, replacing spells with card draws would slow down the class significantly.

Its not like the dps button will be replaced by card button all the time.
Its only replaced during the card preparation just like DNC step replacing their dps button.
After using the card, the button will be back to original dps button.
So we dont need additional separated button for card.
Also the card CD is around 1 sec just like DNC step CD.

Please see this:
Astral Draw --> 1 sec --> hold card --> 1 sec--> burn card --> 1 sec --> Play --> 2.5 sec --> Back to malefic spam