There isn't one, and there isn't a good way to create one that wouldn't mean making drastic changes to the way strikes & playlist works. So what is the answer? There must be at least tens of thousands of people playing the strike playlist at peak hours. There are enough to where I am almost always grouped with two other people near-instantly upon launching it, so the solution is to prioritize putting people into games with less than three players. It can't be a massively difficult change to make (though with how long it is taking the devs to make TDB scout rifles load the right amount of ammo...), and it make these quit on strikes not just a waste of time for people with limited time to play.