>>120079454there actually is a way to control 1st hit crit chance (though I highly doubt bang is capable of doing it in the middle of a match)
The way it works is that every time you crit you get a new animation right? The trick is to hit things (usually minions) and keep an eye on the animation of your champion as the projectile is about to be released, if the animation startup is the animation of a crit, you cancel your auto attack (simply done by pressing "S" or issuing a move command).
Once you do this, the way crit works in this game is that the next auto attack you make will crit no matter what because the last auto attack you made was cancelled before it actually hit a target. It almost works like an "ammo system"
If you don't believe me go into a custom game and buy 50% chance crit chance and look at the different animations of your character when he crits. Cancel a crit animation and the next auto attack will crit always.
It should kind of look like this
No Crit -> Crit -> No Crit -> Crit (Cancelled) -> Crit