Riots , as the name suggests , is excellent at shooting down the masses , But horrible When it comes to Anything that is of Core quality or above
The shotguns are Pretty much best if the AI keeps pushing Mass troops down into your wormhole , Lasers are perfect against small clusters of ships , Machine gun does a good job destroying loners and wiping out Survivors , the Taser can stun whole armies in one shot , which makes it excellent in combination with a shotgun to destroy them and a laser for those who managed to somehow avoid getting hit by the elec blast
the FF addons can protect the Riot and a small group of ships
in short : Defense riots Should have a FF addon , shotgun and taser , Support riots Laser , machine gun and FF , Offense Goes Shotgun , Lasers and machineguns
Try some other combinations and see what matches you , the riots have limitless customization combinations , Just remember that the Laser and Machinegun are the long range shots of the Riot