Pockets aren't that reliable for a heavy wetter I don't think. I tend to find that if you overstuff them then the wee just comes out of gaps at the legs . My most reliable pockets are an upsy daisy and a (cheap) babyland!
I use totsbots bamboozles with nature babies wraps and they work very well. I add little lamb size 1 bamboo boosters, which aren't too expensive at £12 for 10 on ebay (cheapest I've found for bamboo). Make sure you wash the bamboo a few times before using. Bamboo anything should stay soft without using a dryer. If you can line dry outside then do as that helps. Also have one easy peasy bambeasy which is bamboo with a fleece lining. Also reliable, but bulkier than the bamboozles.
Apart from that, the most reliable AIO types I have are bamboo pop-ins from close parent or itti bittis. The latter can leak if you use too many inserts. Pop-ins are great, but not that cheap. Keep an eye out on here. I wouldn't recommend the micro-fibre dream-dri version for a heavy wetter; they only last an hour on my 16m old!