Here were my take a ways from my testing leading up to the release event and the release event itself.
Pair Unicorn with with Dragon, Crab, or Lion. Scorpion is a nice pair, however, there is just too much self inflicted dishonor caused with this pairing.
Play the Seeker of Air or Seeker or Earth. Generally I prefer the Keeper role in the single core format. The recursion of characters is extremely valuable. However Unicorn have a hard time honoring things and have some key cards that trigger off cavalry or the character being in clan which the monks are neither. Unicorn are very fate dependent so having two provinces that can gain you extra honor when revealed is crucial. Entrenched Position under your stronghold is about as good as anything else and being able to use Captive Audience defensively is a neat trick. If you choose to go with Seeker of Earth then you just switch between the two Earth provinces depending on which clan you are facing.
Movement is important. Obvious statement but it's important to move your people around, even if they are bowed. Your core movement cards are, and in no particular order of importance, Shinjo Outrider, Ide Trader, Giver of Gifts, Shinto Tatsuo, and Spyglass. Keeping Ide Trader and/or Spyglass in play will help you build a hand advantage w/o having to sacrifice too much honor. This is crucial to your success, so mulliganing when you don't see these cards in your first 4 needs to be considered.
Born in War is overrated and if you pair with Dragon in particular, there are better items for the cost. Breakthrough and Way of the Unicorn have little use in the deck. Contingency Plan was much better than I first thought and should ne what you full out your deck with if you find yourself short on conflict cards. Good Omen is also good filler as you will have several important 3+ fate characters you'll want to keep in play to help maintain you hand advantage.
You don't have a very high Shugenja or Courtier counts so keep this in mind and limit the number of cards which require you to have one or the other.
Despite being the worst single core clan, you can be successful with a little luck and clever play.
Edited by Ishi Tonu