We were in the bullion mint. Hit a lured level 10 cog with a maxed storm and 2 hoses (at least one of which I am sure is maxed) and the cog survived.
How do you know the storm was maxed?
But to verify what I said.. A level 10 cog (10+1) * (10+2) = 132 hit points.
Maxed hose and storm = 30 + 80 = 110, add in the same gag track bonus (20%, giving you 22 points) and you have 110 + 22 = 132 points.
Now, with the exception of flukes in TT (they do happen, no matter how much Disney tries to deny it), usually little things can be figured out.
If I were to take a guess for your situation, I would say that either it was a fluke, or it was an 10 with an extreme weak storm OR an 11 with a not-yet-maxed storm.
Level 10, even with 2 maxed hose, the storm would have to do at least 50 damage to kill the 10.
Level 11, with one of the hoses maxed, then the other hose (may) not have been maxed, but the storm certainly couldn't have been.
Both of these are ignoring the possible lure bonus.
What exactly happened, I don't know because I wasn't there and didn't see it for myself. I can only speculate. But under normal circumstances, it should have worked if all 3 gags were maxed.