You're welcome! Maybe I'll see you around Mox?

At this point, you need more field buffs, in order to make your multiple combats even direr.

Akroma's Will is just awesome. Even without doubling combat, if you have Saskia on the field, you will gain A LOT of life.

Bond of Discipline is great for the lifegain too, but Gruul Charm offers you a similar effect (getting creatures through) for cheaper.

Titanic Ultimatum or Beastmaster Ascension might also help you get damage through.

By the way, it is an expensive card, but Training Grounds would make an excellent addition to this deck. It would allow you to go infinite with cards like my other recommendations as long as you have a sac trigger. (Ashnod's Altar and Phyrexian Altar also close combo loops for you.)

Another recommendation:

Demonic Gifts can be cast continuously until you are ready to go big, as long as you have a sac outlet to keep killing Cormela and one mana to fuel her each time (which you get back on the back end of the combo). Could be good to build up 'on cast' triggers.

How about Victimize? You can use Cormela to cast it, sacrifice her to it, and then return it to your hand after it resolves on her death trigger (since her dying is a part of the resolution of the ability, not a cost, it goes on the stack after Victimize resolves). Then you can cast Victimize again to return her. Gives you a ton of value basically, and can go infinite if you have creatures that sac/ETB to give you mana, and a way to sac her again to repeat the combo.

Thanks for the upvote!

Few more recommendations, this time using your counters for great effects.

Black Market gives you some good boardwipe recovery, assuming it's not Farewell'd or something.

Door of Destinies can help keep your field big even after a boardwipe, too.

Jugan Defends the Temple  ^Flip could also be a core 'building' card in this deck. I can see it helping in many ways, and you'd get the payoff almost immediately.

Speaking of modified creatures, Kodama of the West Tree is so good in this deck it makes me want to barf. Definitely add it, and I'll try not to puke on your deck, lol.

I recommend Krav, the Unredeemed as a way to draw cards without dumping a bunch of mana into it. Also gains you life. Only downside is it's not a Fungus.

Liliana, Dreadhorde General is great in this deck for many obvious reasons.

And hey, since there's so much sacrifice going on, why not Mazirek, Kraul Death Priest?

Now, your graveyard. Seems to me you need more steady ways to toss Fungus in there. How about Cemetery Tampering, Crawling Infestation, Crawling Sensation, Crop Sigil, Uurg, Spawn of Turg, Deathbonnet Sprout  ^Flip, Nyx Weaver, Old Rutstein, Out of the Tombs, Splinterfright, and Throne of Death  ^Flip.

Deadbridge Chant isn't steady, but it's great explosive mill.