Well, the ideal is a chess game (for me also ideal of a miniature game if we talk about luck/skills factor): you know your models and what to expect from enemy models. Card should be always available for opponent to read, and opponent should provide info about models when asked (other story is that i do not provide myself with info about my crew's abilities, always forgetting about things i can do, which could explain my horrible defeats). That's how we play and i always considered this as a standard, not something exceptional. Gambit is an example of "good deceiving". In that case opponent before doing anything should do some reckon, check what to expect, read cards, ask etc. If he is not doing it that means he doesn't care about his crew and game and should be rightfully punished with defeat so next time he would not make the same mistake.