There's zero chance that anyone on this forum knows more than Buildzoid.
What guides did you follow and what exact settings have you tried? You'll need to list all voltages (DDR, SOC, etc) and exact timings but even then, without the RAM infront of me, I don't think I'd be able to tell you exactly what settings to use since memory overclocking requires a good motherboard, good IMC for your CPU to do anything impressive.
You'll probably need to do a manual OC where you start off with loose timings at 6000 MT/s and then lower each one at a time, documenting your process on paper, and stopping when you start to get lock ups/BSOD.
Unless you're prepared to put in a couple days effort testing individual latency settings and then another couple days testing the RAM to make sure that there's no dataloss/corruption from the OC, I might suggest just using the existing 6000 MT/s CL32 profile and leaving it at that.
6000CL32 is fast enough and you might see an improvement but it might be a small improvement at best.