X3800h, 5.1.4, and, monoprice amp m2100x 2x90watts.

Im looking for some advice and what channels should I use the monoprice amp on with a denon x3800h running 5.1.4. I have the Energy Reference Connoisseur speakers that have the rc-70s for lr front, rc-lcr for center, rc-10 for surrounds, and 4 polk owms for atmos. The denon says 105w for 2 channel mode so im not sure if i should use the monoprice m2100x that does 2x90w. Thx