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I'm having the same problem. From reading about the event on Reddit it seems that the best people can do it get 1 star but that's only if the rng is in their favor. This was the easiest event for me in proving grounds and I bought the conquest pass + for the first time in hopes of getting CAT a month or two earlier than I would without the pass, but with the rework, nothing I have can even put a good dent in the team. The best I have been able to do is take out Maul, but then my team gets smoked be the 3 ISCs and Gar. When I did this event in the normal proving grounds my team of Padme (R5), JMK (R9), GK (R8), JKA (R5), and Ahsoka (R7) demolished this team and now I can barely do anything. For those who don't have amazing characters to use against this team, CAT is now one of the hardest characters to get if you didn't already 3star the event.
