Seatpost Options for Technical Riding

So I intended on using my fat bike for riding street and mtb trails once the weather picks up, and I was going to get a dropper seatpost however my bike doesn't have routing for one unless I go 1x (which I won't and is non-negotiable atm) or if I do some funky external routing. I was put off by this when I saw that some posts had weight limits and since I'm ~360lbs I didn't want to take that risk and opted for getting a seatpost collar with a QR lever. Unfortunately it didn't last long as the seatpost began to twist even when it was tightened to the max, and I bent the lever when I attempted to over tighten it. I tried my original collar and tightened to 5nm and it's solid so that's not an issue.

I can get away with stopping to adjust the seatpost so I don't need a dropper post with a remote lever (that seems more like a luxury than a necessity), but I did come across Dropper posts with integrated levers in the seatpost which seems like it would work perfectly for my type of riding. I'm still uncertain due to the weight thing but if I *could* get a dropper post I'd also need a shock pump since I don't run suspension. Or I can just cut my losses and invest in a portable torque wrench for my seatpost (shrug).

What would you all recommend?