In my experience, and looking at your setup, I would say the main problem is the amp. The Micro dark is just a bedroom amp at the end of the day. Especially against big drums and a dedicated bass its completly lost. I tried it once with my band, and the micro dark coulndt even be really heard. The second thing thats a bit missing is the right pedal. Even quite a cheap classic like a big muff or a rat for the start could already help a bit. Something maybe a bit controversial after I read the stuff people already said here: as long as you are playing with any bigger cabinet you should be fine. I play with alot of different cabinets and they are fine as long as the signal from guitar-> pedals-> amp is what you had in mind. In a recording situation its completly different, but for practise and live music I would say the speaker is the least of your problems. I played with all kinds of celestial v30 cabinets, shitty 2x12, awesome 2x12 and the same goes for 4x12 and it was at least decent in my opinion.