This board is very dry, and there's a clear hand that you're repping. In this kind of spot I think its fine to bet around 6 and then barrel pretty often.

If you bet 6, its very likely that ppl will call midpair type hands but will have a tough time calling double or triple barrels.

If you bet too much on the flop, it could potentially change his range that he gets to the turn with, quite a bit.