Excellent deck! Very well built I would play with Vickie Cr for Edd and Harold for Nellie, but that decreases two hit ko capabilities so yours is better for deathmatch.
From my experience, type 2 deathmatch generates more points (since there is no star limit, almost every card can ko therefore faster matches). You could upgrade to something similar to what I use sometime; Jackie, Zatman, Dorian, Glenn, Eyrik/Hugo/Ambre, and three more cards that powerhouses or reducers. I do GraksmxxT, Uranus, and SkrumxxT. But it could easily be something like Hawk, Copper, Chloe/Havok.

As for a strategy with that deck, bluffing works wonders when you have amazing cards such as jackie and Mona. Try to get the first hit when you know you can so the ball will be in his court and you (hopefully) have a ko opportunity.
Good luck