I'd be fine cutting out the back-up C slot, giving those minutes to Lyles and start experimenting with T.Davis 8-10 MPG instead. See if that helps give the bench a more consistent scoring punch. Certainly couldn't get much worse defensively.
I've been on this train for a while. Let's stop trying to plug the Domas shaped hole in the offense with Metu or Holmes and just go all in on offense with Lyles as the backup 5.