If you fractal the micro abominations, are you sure you will have enough quanta to summon all of them? With your mark you can summon one per turn...
He can only immortalize one per turn as well, so it's okay.
This deck wouldn't be very fast then...
Especially in terms of damage...
You don't need to immortalize fractaled cards, the goal of them is to outspeed the opponent.
I suppose since this is a stall deck, it's okay...
But if you don't have the nymphs...