Thanks all for the suggestions!
I decided not to go for kobals and skullclamp to ensure I can make large paradoxical outcomes as well as more glimpse triggers by replaying the creatures.
Fastbond or crop rotation as a ritual effect is interesting but the extra mana has little use during that stage of the combo.
Using bushwacker as a wincon doesnt seem to be worth splashing the extra color over lab maniac or brain freeze. And yawgmoth's will has few targets early.
I ultimately decided I could cut a couple creatures as suggested by the hypergeometric calculator and made the following changes:
- 2 phyrexian walkers
-1 elvish spirit guide
+1 memory jar
These changes should help increase threat density and allow for a better fight against decks with mental misstep and force of will.