A specific set-up that I ran into yesterday that was near impossible to beat was actually a Mobula. Here's the set up from left of the captain to right of the captain. Credit goes to Romankar.
Artemis- Gatling- Merc- Flak- Artemis
Oh that's interesting. I've been toying around with the Mobula recently and landed on a similar build with staggered Gat/Flak above and below deck respectively and Merc up top. Not experimented much with the Artemis arcs on the sides though.
You really need to. Artemis has an amazing swivel range, it's like the new merc/sniper. It doesn't do as much damage but it's just as accurate as the old merc and actually has more swivel. Now that everyone uses it I can't figure out why we didn't in the first place.
Especially if you put it in a spot that normally has a poor position (edge of mobula, side of goldfish, front of Junker, etc.) they can help cover a blind spot or create a trifecta of guns.