depending on your rig, maybe a cut at 6500 is a bit too much. I tried those values and now I tend to set it up more to 7k5-8.
for the low cut, I set it at 95 minimum just to give more bass if our sound engineer need it but the cut is also set around 110.
the « secret sauce » if you want a fat tone is the mid, M Britt profiles are perfectly setup for that at really high volume.
also reverb that sounds great at home can mess everything live at high volumes, I just apply a really small amount of reverb just to give a little less raw tone.
My conclusion also is that when you use units like kemper or modelers you have to do some compromise between what tone you like to play and what works 99% of time straight to foh.
I use 69 Marshall m Britt profiles exclusively live (all styles possible expect i don’t play jazz) I don’t like them that much when I play them but I gotta to admit they are really tailored for live use and are some kind of no brainer.
I wish i could find some profiles that I like to play and work well live.