This deck is built around hitting Alternate Larx' Grit quickly to take full advantage of the keyword. As such, it probably works best at 2 or 4 players, due to the way Grit scales with player count.

In the early game, use Kicking in Doors, Without Regards to Losses, All-Nighter, and Trust Your Instincts to get value out of discarding your cards. Don't be afraid to suffer stress from threat values and dilemmas. Then, once you hit the Grit threshold, Secure the Area and Background Check can handle basically anything the game throws at you, especially once upgraded. Encouraging Speech helps with action economy and allows your teammates to benefit from lowered threat values from Antique Wristwatch or Early Warning System, since those only last during your turn.

This deck is built around Secure the Area and Background Check, so push them to Level 3 quickly. In general, you should prioritize upgrading a few cards from 2 to 3, rather than many from 1 to 2. You're only playing with half your hand for most of the game anyway.

Antique Wristwatch and Tilidifene 800 give you more Hope as you discard, which you'll need because you don't want to discard cards to stress once you've unlocked the Grit threshold. As such, they are great starting picks once you have the starting resources for them. Self-Defense Training and Insatiable Curiosity let you make the most of your improved stats. Just make sure you can afford Final Hearing when the time comes!

I've tested this in a 2-character campaign, and it performed pretty well. (I ended the campaign with only 2 "Nubicon watches you" at Hard difficulty,)