For the smaller venues, I just run both amps straight, no micing or D.I.
For both keys, I use a Rickenbacker TR35B, and for guitar, I use a Fender 112 Deluxe.
For the large venues, I mic both amps separately, and the amps basically become my on-stage monitors, plus I'll have a wedge down in front for vocal monitor mix.
I used to use in-ears, until I started getting headaches because of them. Nixxed that idea real fast.

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...shboom