Are you playing by your computer? Does the buzz go away at some point if you pivot 360 degrees? Do you have more than one pedal connected at a time?

It's possible to pick up radio frequencies (RF) with just about any cable/guitar combination. Maybe even more so with that amph. If you switch the fuzz on and stand up and slowly turn in a circle does the buzz get quieter at some point? Also, make sure your guitar cables are not near any AC power cables such as the amph AC power or any other device like a lamp or wiring in the walls or floor.

Try plugging in just one of the offending pedals at a time.

If the Deluxe Reverb has a ground switch on the back (might be the on/off switch) try it in a different position than the one where you usually get a bad buzz. Try moving the amph to a slightly different location and orient it a few degrees differently than the current direction it is facing. Then report back. Good luck soldier.