I'm a weight weenie with my fat self. I use heavy ( cyclist standards) 30 mm Deep V rims, nothing light about my bike.
I use heavy stuff and the only thing that makes me fast is losing weight and training. For me, at 250+, climbing is slow, at 230, it's faster and at 220, it's fastest....with the same rims, bike, tires, and bottle cages.
I want durability!
I actually get a chuckle when other clydes my weight tell me that my rims are too heavy to climb.