Here are some ideas from my Teysa build, which does some similar stuff.

Mind Slash , Infernal Tribute and Phyrexian Plaguelord are some more sac outlets for your critters. Tribute is good also because you can gather value from non creatures being destroyed.

Wayward Angel I'd love to find a place for her in my Teysa, but there's no room. A Serra Angel that turns into a Lord of the Pit when there are 7 cards in the GY? Cool.

Dark Prophecy gathers lots of value off sac'd creatures.

Diabolic Tutor and the Transmutes Shred Memory , Dimir Machinations , Dimir House Guard , Brainspoil and Netherborn Phalanx are good budget tutor effects. I use Shred, Machinations, House Guard and Brainspoil in my Tesya.

Here's my whole setup. Where can we put ALL those corpses. Some of it is likely outside your budget, but you can grab some ideas at least...

Thanks for commenting, hereticloki! Phyrexian Plaguelord is already in the build, honestly, I'd rather run Sadistic Hypnotist over Mind Slash . Infernal Tribute is a card I'll have to playtest. I love the Wayward Angel , I'll have to look into getting one.

I run several more board wipes than you do in my setup, so Mind Slash 's enchantmentness is a plus there for me.

Also, don't underestimate getting a look at your opponent's hand(s). In multiplayer, there's some free negotiation capital...

True. I'll look into it.

Also, I just wanted to add I don't have enough sustain to run Dark Prophecy . If the deck had more life-gaining elements, it would totally go in.

Falkenrath Noble and his more expensive pal Blood Artist provide some serious sustain for this type of setup.

Blood Artist has already made his way into the deck. I was thinking of putting in Falkenrath Noble as well, but I don't enjoy gaining mass amounts of life. It gets boring. It also helps to add that there is a LOT of lifegain hate in my playgroup.

I feel kind of honored my deck has already been added to a folder.