Well, with over 300+ deck ideas and over 2000 cards, you got ALOT of options.
Some really good decks in the MD-on format were this (that CAN be played in Palace)
Dialga-Chomp (Dialga G LVL X + Garchomp C LVLX)
Blaze-Chomp (Blaziken FB LVL X + Garchomp C LVLX)
Mind you serious mods must be...