I ran
Infest for a long time, and eventually switched it out for
Black Sun's Zenith. It sounds silly, but it's really terrific in the deck. For the same cost as Infest, it handles token hordes. For the cost of
Damnation, it handles most of the format. We have plenty of sac-effects to pick up stragglers, and anyway, Zenith permanently shrinks the creatures it doesn't kill. Its recursive effect is nice, since you start to see it more and more often as the game draws on. Additionally, it serves as a shuffle effect for Sylvan Library or Sensei's Divining Top. You can also cast in on 0 to save it from a Liliana activation. Often the situational nature of sweepers makes them bad topdecks with Liliana down against few or no creatures (often Aether Vial decks will hold up creatures until they can pump a bunch out at once to overwhelm Factories/Liliana). (It also has some funky corner-case applications, like preventing death by Jace ultimate, and stifling Persist triggers.) I eventually cut it because it doesn't play well with Nether Void, which I feel is more important. I now use hellbent Ensnaring Bridges as my main strategy vs. creature-heavy decks.
I can say from experience that
Drop of Honey is fantastic.
The Abyss is far too slow for that effect. It comes down typically turn 4 (if you make all your land drops and haven't had to discard it), when your opponent usually has at least 3 creatures down (in a mid-range shell. In a tribal deck, probably more, so Abyss is awful there.). From there, they can drop a couple more creatures to pad out their board while they swing for the last few points of damage. Drop of Honey comes down as soon as they play their second creature (or their first if it's Deathrite Shaman) and puts the brakes on their development. Either they have to wait it out (and let you 2-for-1 them while you attack their hand and build board presence) or they have to race the Drop, in which case they'll never get ahead owing to additional sac-effects you can play as necessary. While we're not a tempo-deck per se, we can benefit greatly from essentially time-walking our opponent board-wise, since our high curve is our downfall in the midrange matchup. Drop of Honey also answers
Iona, Shield of Emeria!