I will gladly send my settings by E-mail to anyone who wants (it's a Word file)
but know that settings on amps are not the only way to a good tone, settings depend a lot of the pickups used, the wood the guitar is made of, the strings gauge used, and an important part of the tone is the cab and especialy the speaker, settings on an amp depend of all this !
About speakers, i want to tell that i found the Celestions Vintage 30's to be the perfect speaker for the MarkIV (but only the Celestions V30's mounted on the Recto Cabs by Mesa, they are specially build by Celestion for Mesa Boogie, and they are different from the Celestions V 30's you can buy.. different technicals production methodes and different materials used)
I do a lot of studio sessions and don't like at all the MarkIV through a EV speaker.
Some years ago, for a special session, i wanted to use the 1X12 Mesa cab closed back mounted with the EV 200 watts speaker , i found the tones to be too rigid and a little too Hi-Fi sounding, no matter the settings on the amp, it lacked this typical sizzle and smoothness of the Celestions.
After all the takes done, i 've talked to the producer and told him i wasen't satisfied with the sound of the guitar, i told him to forget my recordings and to redoing them with an another cab !
One day later i brought my 2x12 Recto cab and all was perfect, i was able to do my favorite settings and i heard the amp really shines through the Celestions, it was suddenly magic, the sound was like heaven !
This anedocte to tell that my settings are efficient if you use the same gear than me : Music Man guitars and mainly my American Deluxe H/S/S Fender Stratocaster, plus the 2x12 Recto cab.
To confirm what i say, know that to each guitar i have, i've got differents settings on the amp !
Don't sell your MarkIV, it's a killer tones machine, simply one of the best amp i've ever played !