I find that Complete Power. works quite well.
Now lets be serious. It really depends on which clan you like the most. When you have chosen a clan make a deck using there high damage and power cards. Try not to have too much DR unless the DR has high power and damage as they can be a bit slow in a deathmatch.
A little suggestion from me will be:
Fei, Heitachi, Zhu Tang, Kusuri, Blaaster Cr(or Chlora of too expensive), Loocio, Graff, Juicy Lord.
T1 FPC/Ulu Watu
Nanook, Gabrielle, George, Buck/Numar, Fei, Heitachi, Zhu Tang, Kusuri.
This came from the tip of my mind so it's probably not the best suggestion, but I'm sure someone posting after me will correct that or come up with a better one.
If possible: Tsubame (Or Kuei if you can't afford her), Heitachi, Kusuri, Ralph, Graff, Loocio, Blaaster Cr (Or Shogunn) and Bennie should work well. But if you want to start trying to get really high places in the DT you might like to look at some low * T2 or T1 decks like this Really good tornament T2 deck..