Very excited that Mono Decent will be featured in the Baltimore Saltbox cube tournament in March. I'm going to make a few tweaks in preparation to that over the next couple weeks, removing some problematic cards and adding some cards I've been wanting to try.
Wild Nacatl is a classic, but pigeonholes aggro decks into Naya. Rin and Seri serves a similar role, but punches faster as a topdeck, and is usable in more decks. Also has some incidental synergies like buffing heliod.
Maze of Ith is obnoxious. I pulled it from a pack and it survived for a while because I've never been sitting on the other side. good riddance!
Wandertale Mentor was awesome in prerelease, should be an interesting sidegrade from signet.
Stormwing entity is blah, demilich is ???
Heaped Harvest really interests me. Buffs green delirium, and plays into different sac themes.
Wingmate Roc is fun, but I think my top end decks are spamming the floor too much for aggro decks to close out. Hornet Queen is also on the verge of being cut. Gearhulk adds more juice to the stax theme and is a similar power range.
Have about another dozen changes in mind, stay tuned.