What size engine?
The MM lobes are big... but not too big. Depending on the compression and stroke I'd think it could be idled down a bit even at 108°.
Air - If you have oil pressure ont ehg age at idle, the lower end is fine. 10psi is more than enough at idle assuming the clearances are good. But the cam is not oiled by the oil system. It's only oiled by the splash off the crank. So if the crank isnt spinning fast, and the volume is too low coming off it, the lifter bases can be starved and with a big spring pressure flat tappet, that's not too hard to have happen.