Stay as SAM and get good at playing samurai. Know that the skill floor is pretty low, but the skill ceiling is pretty high. Research the job, I recommend joining the Balance discord if you're able. They have some of the best SAM advice and guides out there. Never stop improving. Because when you do finally reach those high numbers of the skilled SAM's, your groups will appreciate you for it despite the lack of utility. Your damage is your utility, so learn how to master that shit. And have fun! Samurai flows so well at 70.