Esp Griffyn
Play more music
Seriously? There's no way that could sound good.
While I would say that without hearing his sound it's impossible to comment on exactly how good or bad it would be, 8 or 9 on mids seems like a lot of mids on any amp, it must sound incredibly honky and harsh, even using really dark cabs.
Unless he means "8 or 9 o'clock" on an amp that goes from like 7 o'clock (comeplete cut) to 5 o'clock (max boost). In which case his mids would only be 2 or 3.