Heh, this is an interesting topic. Maulus is a really cool loooking ship, but it seems a bit strange to use it for pve.
If i had to fit the navy variant for some low level missions, I’d probably go for something like the following fit:
[Maulus Navy Issue, beams]
Small Armor Repairer II
Drone Damage Amplifier II
Drone Damage Amplifier II
Drone Damage Amplifier II
1MN Monopropellant Enduring Afterburner
Cap Recharger II
Small Compact Pb-Acid Cap Battery
Dual Light Beam Laser II, Aurora S
Dual Light Beam Laser II, Aurora S
Small Anti-EM Pump I
Small Anti-Thermal Pump I
Small Energy Locus Coordinator I
Acolyte II x5
Obviously, the damage is pretty low - just 139 dps with max current alpha skills and Radio S, 149 with Aurora S - and the tank is bad, too. But I’d say this is totally okay for some really low level pve, like lvl 1 missions and low level combat sites in Amarr high sec - if you absolutely want to fly a Navy Maulus.
Like the people before me said, other ships are more viable, especially since you can buy a cruiser with some T2 modules for the money you’ll spend just on NMaulus hull.
Change resist rigs to Thermal + Kinetic and guns for small 150 prototype rails with Tungsten S if you want to go to Gallente space.
edit:
I just logged into the game and realized that you probably want to use the ship for Rogue Swarm sites. Maulus above should work, I suppose, but it will be annoying to use and you will only get to use your drone dps(with drone aggro all the time etc) as you’ll want to stay a good distance away from the drone swarms.
If it’s only about looks, check out Guardian’s Gala and Headhunter skins for the Vexor. Those look pretty cool, too, and you get a much more effective ship for the task.
edit2
changed the fitting for a slightly different one.