MAybe some creatures with oppressive blink abilities like Rishadan Brigand, Lavinia of the Tenth, or Stonehorn Dignitary to really hold your opponents down while you advance.

IAmTheWraith;

I have had Lavinia of the Tenth in the deck before and it really didnt do much in my playgroup's meta, it either made me a target or it did nothing at all. a fellow flicker player who uses Derevi, Empyrial Tactician and her advice made sense at the time. I Still have the card if that changes.

Stonehorn Dignitary is something ive been considering but im going to be playtesting a bit more to see if Its something id want in the deck, I own this card but havent put it in yet to see how it would work. i like the effect as it will STOP a player i know who uses commander damage and I could use it to play politics. just havent found a slot for it.

Rishadan Brigand If i could infinite flicker this, that would be amazing. Before I order it or test it any further id have to check how my deck currently plays and find a weak card to remove to put this in its place. I might buy it and playtest with it within the coming weeks. Thanks :D

Rishadan Cutpurse and Rishadan Footpad are two more creatures that have the same effect.

Interestingly, they are a common/uncommon/rare cycle in the same set.