Fracturing gust is a good utility card that I've seen people gain tons of like from. If you time it right it will hurt everyone else much more than you.
BTW I really like the list. I love swinging with huge monsters.
Have you ever seen a recurring insight go off? It should read draw 14 cards over your next 2 turns. Definitely very powerful. Aeon chronicler seems too expensive for what it does. I would rather play Azami,lady of scrolls in this deck because you'll usually atleast 4 cards since you can flash her in end of opponents turn draw 2 with her ability and them draw another 2 after you untap. And that's if you only have your general out. Add some more of your wizards to the mix and you'll be drawing a boatload of cards. Another land to look at is riptide laboratory because you're running a few wizards. With Venser it's basically your second capsize.
Also Jace 1.0 hasn't been that great in my experience. It's usually draw 1 card for 3 mana. I would remove it for Fact or fiction .
EDIT I also have some more expensive suggestions but I wasn't sure what your budget is. What are you willing to spend per card?
Take out mana leak and put in arcane denial because it's a hard counter and you get to draw. Has corrupted conscience been useful? Ive never used it but it looks good. I would take out boseiju for reliquary tower because your general is better at making your spells uncounterable. I also would add more draw, cards like recurring insight and Myojin,of the seeing winds because they're a lot of fun and can pretty much give you a huge advantage. I would take out cancel for dissipate and unsummon for pongify as well. You might need more counters considering once you're general hits the board you'll be the only one able to counter spells and some nasty game ending stuff might slip through. Maybe take out dominate and put desertion in.
The list is nice. How has filth been? I would probably use grave Titan instead because it goes better with your sacrifice theme like braids,contamination,atrition etc. I also don't see smokestack which seems like it belongs here. Has nightmare incursion been good? I think I would prefer sadistic sacrament because it can get played sooner so they're less likely to draw or tutor for the cards you can't answer.
People that use mass land destruction with out a clear advantage to win the game. Player A "I cast Armageddon." player B "Oh great a five hour edh game that half of which I won't be playing anything." .
Cryptic command , dismiss and mindbreak trap seem better to me. Last word's ability is useless if you're not playing against blue.
BTW I really like the list. I love swinging with huge monsters.
That should do it. Throw a expedition map in for good measure.
Or Pithing needle . I've lost due to Necropotence so many times because of mindslaver I stopped running it.
Also Jace 1.0 hasn't been that great in my experience. It's usually draw 1 card for 3 mana. I would remove it for Fact or fiction .
EDIT I also have some more expensive suggestions but I wasn't sure what your budget is. What are you willing to spend per card?