Should I just always use Launcher when not in boss rooms?

I'm having trouble deciding when to swap to launcher when mobbing since mobs always aren't like stacked together and a lot of the times spread out a bit. I know on occasion when a boss type spawns in the middle of mobbing to swap to rifle and blight it and all.

Divine Launcher 0 (you need to craft it) has huge AoE at a cost of more PP and you need to charge it. Still, that AoE is insane and you can try it out. Also, if you don't like it, it cost you 2 ex-cubes to do a reset you should just try it.