>>713336056For defense maps I bring RR and GL-emplacement. I sit on the emplacement lobbing grenades removing all the non-heavies.
Usually it'll last long enough to go off cooldown so I just throw it down on top of the old one to continue plapping.
When/if a heavy shows up I unholster ol' reliable and hop back on the GL.
If you can't content with the heavy-spam consider a tesla, it's generally a good support-sentry with a low enough cooldown that you can use as a giant moth-catcher.