Boosters only??

Hi, has anyone used just boosters? I have pocket diapers which keeps leaking ALL the time and I am in the process of experimenting and trying out having the liners on top instead of inside the pocket. But I didn’t know if I could use just the boosters instead? I found these fairly thin help/cotton mix on eBay that has great reviews so I got them to try and they are thinner in comparison to the liners I have so hoping it wouldn’t make the diapers bulky while also absorbing a good amount. Has anyone found that to be helpful or better?