@Anthony76 is giving you the correct advice.I prefer keeping my output knobs on the AX8 at MAX (recommended in ax8 manual especially for those who record) and setting the volume on my Eli’s 8’s lower. Also if I set the volume a bit too high on the Elis 8’s I can always reduce the volume knob on my guitar.
Do you see any problems with this strategy?
The Elis8 manual advises to have the volume at “8” which is 3 o clock.
Use the Fractal to control output volume.
Using the volume on your guitar is definitely the wrong method because this will change your tone. Depending on the amp model you use, rolling back volume will clean up the amp (from overdriven to clean).