Pedal settings for blackened doom metal

Hi, quick question.

I'm trying to get a good sounding distorted sound for some blackened doom metal by running a Boss HM-2w, into a Behringer SF300, into an amp with scooped mids that's more bass heavy then treble.

But the sound comes out just to noisy and all the chords sound almost the same. Would a noise suppressing pedal or just some changes on the settings help?

Thanks in advance!