No good for dt..

1. You do not need defeat cards at the Dt.
2. Zatman OUT!
3. Raise it by one star and go T2 as it is already too many stars.
4. The strategy you are talking about on your preset kind of sucks
-Lets say you have Jackie Cr, Rudy, Elvis and on of your 2 star cards
Jackie Cr beats a 5* card
You lose with Rudy
Elvis finishes off a 4* tops.
You get 17 points for a 3 round match, playing a lame 2HKO. In any other case it will be approximately 14-15.
(most points for your strategy as you described it)

even if you win all you matches, and lets say you will encounter the fastest opponents at the game (that goes for you as well) and that you will have Jackie Cr all the time.
You will have to have 25 matches to win the Dt with at least 20-22 wins.. ( Again best scenerio)

So
-Change your deck to T2
-Remove Zatman and go for Nellie. That should do the trick
-Rudy for Jeffrey, cause you will not always have Jackie Cr