If you want scrip and modules the raids are the way to go, 2 modules per raid and some scrip too, 2-3 legendary weapons/armour parts each run too, all in around 2 minutes for the first room start to finish. This will be nerfed soon so it's best to get in now, PTS already has a fix on it for the auto axe method.
We only do the first room but are really wanting to do them all eventually, we would need another couple of players when we do go to room 2, deffo need one defending and two getting fuel, then when they are enraged I think we would need two defending....need fairly decent damage or lots of shots.