Executor is a beast? [MERGE]

We have a 5* and a 6* Executor in our shard and they doing quite well. I finally was able to defeat the 6* with my Negotiator, but it was a close thing. I've been blasted out of the sky by the Death Star every other time. I don't think the Executor needs to be any more powerful. I am still working towards getting one. With respect to the 4*, 5*, 6* defeating the 7* Executor if the reason they are doing this is because they get to the Death Star blast first, then the answer to that is obvious - increase the cooldown for the 4*, 5*, and 6*. If it is some other reason, I'm sure there is something else that can easily be done.