I've been having a ton of success with this deck over the last few weeks, maybe losing two or three games out of dozens. A few things I've noticed, some even the more skilled players in my meta make mistakes on right now:
Don't ever trash installed ambushes! This is a bit counter intuitive against most decks, but it should be a no brainer against the shell game, as long as you have the endurance to keep track of the servers.
Trashing them allows recursion with Jackson, and taxes in the case of Psychic Field.
Run archives. I'm running a single shi kyu in my list as protection, but I'm noticing it being cut from others, and it's the first card on the chopping block when I consider changes. The Corp is going to stash The Future Perfect there sooner or later, and a run at archives will eliminate a shell when Jackson pops off.
Run the unadvanced cards. Especially early. As long as you have a hand of hit points nothing installed with out advancement can kill you. Worst case scenario is a snare, but installing a snare is always a gamble for the corp. The corp player would rather install those 3/1s than leave them in HQ, sniff them out.
Keep very close track of the Overwriters and Ronins. Ronin is the only true proactive flatline method, while overwriter is the bluff card. These two are the main targets for Mushin. In my opinion, it isnt until the late game against Shaper recuring Deus Ex, or where your meta has progressed tactically, that playing Mushin on anything other than Ronin or Overwriter is optimal, so keep this in mind. Flip a coin on the triple advanced card or be prepared for the net damage.
Siphon the shit out of them.
(Hope this helps. Or maybe I don't. Mind games!)