Those ideas are fun !

I like the aspected malefic...
But i agree that pairing it with a card is not good, this means a 7 forms skill (or at least 4 if you see card as pair)
I think it should be an instant damage spell with a cooldown (15 sec)
Which give or could give the AST a bonus (next healing spell +10% potency or next damage spell +10% potency or +10% critical)
=> either a set buff that can be granted... Or to follow the RNGness of the card... A random buff
==> to be sadistic... Having a possible negative effect (-5% potency for 10 sec)

....

The crepusculum sect is marvellous! Yeah a third one that could give AST a new face !
But a drain effect... Isn't that the same as the war skill...
And it would be weird on caster XD
Like... Fire IV ! 12000 dmg critical... Drain 1200hp (supposed 10% leech effect) -> why do i bother healing ?

...

I like the hyperion one, not fan of the aspected version XD