Update: Tyrant.

After much huffing and puffing and google-searching, I have come to a conclusion:

There is no one deck that is typically successful on every mission in the campaign.

Rather, making faction-hate decks (anti-raider and anti-xeno, for instance) is 100% more effective.

Furthermore, purchasing packs is a good idea, and I figure saving up for the "elite" service is worthwhile.

I'm running Xeno hate, Raider hate, Imperial Mono, Bloodthirsty Rush, and Xeno muscle decks at the moment.

I've made it to mission 40ish, and have moved on to farming mission 34 (much more profitable than missions previous to 20).

Also: I've been working more with my f509 tablet, and I'm now starting to put more content up on visceralnadir. What say you?