I use this Breeding Jam Machine to farm Keith lvl 40. The goal is to give BJM to Keith in your first turn, either by using exchange gift or Surprise Present skill, and to summon UG or Rai. This is a quite cheap deck to farm Keith with almost 100% win ratio and 8k score.
If you don't have surprise present skill, you can try a version using Restart skill and some reload/magial mallet to ensure both UG/rai and GE in your first turn. However, the wining ratio of this version is barely 80 % (you can also use this version to obtain 3DS cancer for Paradox Brothers).