Hello everybody; could you illuminate me on the card priority? I mean, if on the same unit are used: an enemy minor artillery, a friendly fire minor artillery (splash damage), a repair card, a bribery card (on a merc, of course) and a airlift (or evac) that removes it from the war zone, what is the order in which they work? That can change completely the outcome of the battle.
I would have tried that myself, but I don't have Premium and I couldn't yet find a partner to play some friendly private games (and some coop, too). If anybody is interested in playing some easy coop ( finished the first 3 and number 6, but if you wanna do them all I'll help you too), please post below (and your time interval available - usually). I play every day for 2-3 hours from 3 to 5 GMT and sometimes from 15 GMT.

First action from both players occurs -- coinflip to see who goes first
Second action from each player occurs -- coinflip, etc.

So

Player 1 minor art (Player1 won flip)
Player 2 repair
Player 2 firepower buff (Player 2 won flip)
Player 1 octane
etc.

You mean it matters in which order you cast your own cards (and your actions in general)? Wow, didn't know that. So, if we both cast minor as the first action, it's a cointoss between them. But, what if our first actions are minors too, but there are some queed movements from previous moves, the arties still go first, right?
So, in general, cards always have priority over other actions, but it matters the order in which you use them.

Movement does not count as an action. Making a unit or making a card are the only "actions" for ordering purposes.

Thank you very much, that should help a bit to impove my playstile.

so minor arty and evac are coinflips too? like if minor art wins the coinflip then it takes dmg before evac?

Yes.