I had a 3v3 match and these were the enemies we had. They all have the same word in the beginning of their names so I thought they were bots, and then we got folded. One of them even went outside repeatedly when they were defending.
Increased mag capacity + increased damage. Slower reload speed doesn't really matter much if you time your reload correctly. Glaz is a 3-speed, use that speed and be aggressive. Alternatively, you can use a vertical grip and light mag.
I'm Glaz main and I never play any operator other than Glaz except when defending. Yes, my settings are weird and my loadout is even weirder.
No fancy optics, just iron sights and your skill.