A "mating strategy" presumes you're either pairing or procreating, or both. To assume that marriage is the effort of desperate men to "lock up" women is to play into the hands of the current femarxist notion that "heterosexuality is a patriarchal scheme to exploit women." You must be very young.
What do you plan to do when your "mating strategy" actually produces offspring(Heaven forbid)? Abortion? Pawn the poor kids off on the taxpayers? Child support and an awkward weekend every other month or so, if that? Lucky kids. Or, you gonna marry the mother? What's your plan...er...strategy for that?
The only good reason to get married is to provide a stable home for your children, unless you want your sons raised by the unwed mothers you accidentally created, while you were extolling the glories of ample, random pu$$y, in your clueless youth. Or, maybe your want your abandoned daughters to be molested by the parade of mommy's boyfriends, while you're out spreading your seed into condoms, when you remember to wear them? Oh, but, you're different? You're more careful than everyone else?
Sex the way you're doing it is way overrated, and the only reason you don't know that, yet, is because you haven't had enough of it. I'm not here for sex, lad. I've turned down more girls than most guys have had. I'm here to help.
A real mating strategy would be planning to mate. If you're going to have children, wouldn't you rather choose the mother, than have her chosen by fate? If you're going to have children, wouldn't you rather have a plan to parent them, and actually be there to do it? If you absolutely positively know you don't want children, then do the world and yourself a favor, and get snipped; don't count on some random bar floozy or comatose coed to not sprout a conscience on the doorstep of the abortion clinic, and not make you a daddy.
Get snipped, and fornicate to your heart's content. Then, in 10 years, when you realize I was right, you'll understand why no-one under 30 should ever be allowed into a voting booth, and that 18 isn't really the age of wisdom, after all.