I would make it 6bb preflop to try to isolate one of the limpers and give me initiative.

I'm out of position and I've given the chance to take the initiative by checking the flop. I think given the nature of our opponents this would have been a good flop to just bet out large, like 10-12c and take control, we are strong enough to call a raise and probably not folding until the river anyway.

I think check/raising the flop is optimistic given the passive nature of our opponents and check/calling might be the better play here.
I like taking the initiative versus passive players because a lot of the time if I want to build a pot I will have to do it and not rely on them.

Just how I would do it. Gl.

I agree a lot with Pwll here. One of the biggest reasons to bet yourself or to x/c is to keep in all the hands that you are dominating, the FD's. You have medium SD value and a strong draw so doesn't make sence to push out all worse draws and just narrow down his range to hands that beat us.