Another fun match-up.
A lot of cat and mouse mind games.
Feels very even. I tend to give Breakers a slight edge due to the deck being more consistent.
Fallen Kingdom should limit using Ret's ability since the Breakers have the tools to get to a weakened summoner (blast, wind mages, archers, etc). FK can take advantage of undead carriers against the generally lower health Breaker commons.
I like to try to punish forward summoners early with a combination of hellforged units, purge, and pumped-up warriors. I also try to save a blood summon towards the end of the game to summon a line of units in order to get a final strike against a normally out-of-reach summoner with an undead archer or pumped-up warrior.
I try to use good fundamentals with the Breakers. Deceivers are a great value to soak up damage and resources. Along with Wind Mages to control the board, create opportunities, and get free damage when pushing enemies away from deceivers. I try to not leave archers and mind witches vulnerable to retaliation (especially carriers).
I tend to try to save a blast for late game to get an assassination attempt. Blasting a mind-controlled pumped-up warrior can also be very nice. I've also had decent usage with Gwalark in this match-up.