Coil upgrades on stock struts

Hey all, I'm looking at adding alot of extra weight to my truck in the coming months (rockers, skids, front bumper with winch), and I'm wondering what options do I have in terms of upgrading my coils to handle this kind of weight?

I don't want to lift the truck, I don't want to worry about having fights with the dealership over warranty. And I just don't have the funds for it right now. And to be honest, I'm not a huge fan overall I like the stance that I currently have.

Thanks