I haven't tested the deck, but from a strategical point of view,
isn't Ignorant Bliss a win more card?
Yes, it combos with draw sevens and acts as a counter for early Duresses,
but how consistently does that happen?
If you resolve Balance with Gargadon suspended,
shouldn't the loss of their mana be enough to let your clock beat them?
Perhaps Thoughtseize would be better in that slot to help protect the combo?
If you're set on playing Ignorant Bliss,
have you considered playing Academy Rector and Barren Glory?
I think you should shave the deck down to sixty cards
so that you have an easier time finding Balance for your combo.
Going down to sixty cards would make Rite of Flame better, too.
Manamorphose might be something to consider if there isn't a lot of Stax in your meta.
It would help with mana fixing, finding multiple Rite of Flames, and make Will stronger.
You're only playing six other blue cards to support your four Force of Wills.
Without playing more blue cards, I don't see how you can reliably cast them,
so maybe cutting one or two or dropping them altogether is the way to go.
Thoughtseize or Orim's Chant might be better in that slot.
I think you should find room for an Ancestral Recall.
If you have access to one, I think it would be very good.
Besides being a great card on it's own, it has a lot of synergy with Yawgmoth's Will and Regrowth, too.
That's all the criticism I have off the top of my head.
Here's a report I wrote from when I played Gargadon combo:
http://www.themanadrain.com/index.php?topic=32111.0Your build obviously has a different focus, but it might give you some ideas.
... And yes, that deck was made before I realized that Hatching Plans and Gargadon do not combo.
Good luck with the deck!