Consider getting better, hand built wheels. I'm 195lbs, I never broke spokes on a bike that has hand-built wheels by a pro, and I don't baby my bikes, they get their butts kicked. I used to be over 200lbs and didn't have that problem. Or take the wheels to a bike shop, if you have decent rims you may just need them rebuilt with better spokes.

The only exception are the wheels that I built myself I'm having them rebuilt.

I did break spokes on stock wheels on brand name bikes, but I've been riding custom built bikes or heavily modified bikes for a few years now, so much better.