Cargo nets are great for lots of different loads and types/and shape of gear we carry because they are strong/secure and VERY adaptable...(the reason I prefer heavy gauge elasticated)...you can always get items in and out of often without have to un clip the entire load.
But for static ANGULAR permanent fixtures (which are much more likely to slide about)
I'd recommend you go for made to measure Stainless Straps...bolted with dome boots to the deck...or decent stainless ratchet straps and well secured "Padeyes" every time