i have a high tolerance to benzos and can't feel them properly anymore, would mixing them help?

i don't take them everyday, just from time to time but my tolerance got really high. i need like 8mg to feel anything. i use xanax and clonazepam. would mixing them make their effects stronger? i have mixed them before but it kinda gives me amnesia, which i don't usually get. should i take an even dose of each or more clona/less xans or vice versa. i know i sound like and addict but i really just use them to relax and get a buzz from time to time. any advice appreciated.