There's another pet (forgot the name, I think it's a dog) that does the same as Cosmo - without the gunner buff. So no need to console around. Maybe somebody else knows the name of the pet. I found it pretty early but didn't use it because I had Cosmo. Of curse - I mean a piggy with a hat - come on!
Edit: Kaylon you ninja!
Then there must be a third one because I found the one I was takling about somewhere else. I know because I haven't been to Queen's Berth in this playthrough yet. And I also think it didn't heal on kill but did something else. Or my memory is messed up completely and I mix up two pets or so. I'll try to find it and report... when I find the time to load up the game.
But yes: you don't need Cosmo for this.
Actually it was indeed Abraham. I confused Queen's Berth with Serpent's Crown. :oops: