Night Time Help

I saw someone kind of post the same thing but I need help with what inserts to us in my pockets that have worked for you. I don’t like a lot of bulk (though I know this is inevitable). For awhile, until he turned 5 months, we had no leaks at all. The past month I’ve noticed he’s peeing out of them almost every night. I currently have Alva OS pockets with the microfiber inserts, naturally nature charcoal bamboo inserts, 12 GMD newborn prefolds, and 12 osocozy size one prefolds. He leaks out the top but towards his back. We switched to disposables for night time but he leaked out of those so I’m thinking he may need to go up in a size. Has anyone had success with a microfiber and charcoal bamboo together? I’m going to try it out tomorrow but I’m hesitant and SO tired of leaks!