I and a few others found that a smallish dose of nutmeg tincture prior to taking mushrooms made the experience seem more colourful and euphoric; it's hard to assess whether the potency was subjectively increased but that may well be the case. Normally the ground isn't waving up and down like a rollercoaster even when I take a stiff dose of shrooms, so something was doing the job.

It may still have been a stiff dose with excellent set and setting, however.