Proving Grounds for Interceptor

I was able to 1 star it with GL Rey, Ben, Heroes and Holdo, but it was just luck. Basically was able to get into Rey's ultimate stance with just her left. Inqs took like a hundred turns each and built up their DOTS. Release ultimate (which didn't event kill them all) but then they each died on their next turn from the DOTS. Was gonna try a Traya lead next if this didn't work.