Blob round suggestion

[Roomba]

Of course I've never seen the crew make flamethrowers mixed with radium, acids or poisons, but I feel like that would be an effective blob fighting tactic

While very effective it's hard to mix it up in large enough quantities to make a significant dent in the blob, and the moment you run out the blob will counterattack with a vengeance. Welding fuel might not be the best but it's practically unlimited and all you have to do is lug a fuel tank around.