To be honest this executioner team never had a chance. They had pretty surprising magic at their disposal, but they should have been able to finish the fight immediately to win. And they couldn't because FT wizards have seen and experienced too much for such surprises to work against them, coming from mages not powerful enough. Failing to do that, these fellows were out of luck and out of their league.

Still, I'm not trying to dispute everything you say, but this particular fight went as it should have. Logically thinking there's no way some never heard of gang of random mages from the cellar of a castle would pose any serious threat to Fairy Tail.