If I was on Scadrial, I'd go full Mistborn: Allomancy seems to me like it's more go-getting, not to mention how much I fell in love with the idea of shooting around Luthadel in the mists, getting involved with the intrigue and politics of the Great Houses.
In life as we know it however, as many others have said: Feruchemy; it's far more applicable to the kind of problems/ situations we are likely to face.