The above would work well for slightly heavy and heavy wettings, but for VERY heavy wetting, the only diaper I can currently recommend is Rearz Safari or one if its variants like Princess. Paws and Space are very good, but last night my body played catch-up with hydration and I wet heavily (floods) maybe five times overnight, and my Space was a few inches from the back top by morning, close to capacity and no longer able to hold a full wetting at a time without leaking. Certainly not floodable again. So I actually got up in the morning with a fairly full bladder. (unusual for me) Owell at least I didn't have to get up and change overnight. It's rare for me to need that level of capacity, but a bit unpredictable. I have safari on-hand but just had gone with a space, which for me normally would be a totally safe bet for all-night protection.
I'd suggest giving Space a long test and see if they are reliable for you - they probably are, and are significantly less expensive than safari. Space should be sufficient for 95% of diaper wearers.