I just did this, I think I got somewhere.
Here's a before and after clip:
https://soundcloud.com/nakedzen/kemper-eq-tone-test
In a mix:
https://soundcloud.com/nakedzen/kemper-eq-tone-test-in-a-mix (The mix was tweaked for the more middy "before" guitar tone, so it's not perfect).
What I did, was change first the amp eq to bass +0.5, mid -0.5, treble +0.5, pres +0.5 from neutral.
I then added these eq's to the X and MOD spots:
(X) Metal Eq: Low +2, Mid -2.5, fr 750Hz, High -4.2
(MOD) Studio Eq: Mid1 gain -2, fr 280Hz, Mid gain +5, Mid fr 5.1 kHz (The second clip is +2.5 @ 5.8kHz, sounds less harsh)
You'll need to tweak them differently to suit your profile, guitar and pickups.
Anyone have any other eq tricks?