The advantage of Jesmon is he is cheap to evolve (3 costs), can play a sistermon for free "when attacking", has high DP (gains +3000DP when play a sistermon, and +2000DP if Sistermon Noir is presenting in the battle) and "Piercing" (deal with blocker easily). The LV3 sistermon can become blocker in both player turn and "Draw 1" when played, that makes profit for draw power.
The Jesmon deck can work well with Royal Knight [BT2-020] Dukemon. The Dukemon is best to use in the late game when opponent has build up their trash. With the Jesmon's ability, we can summon LV3 Sistermon Blanc from hands or trash, act as blocker and maybe able to drag the game longer. The LV4 Sistermon Noir is to add 2000DP for Royal Knight, so Dukemon has 13000DP.
Jesmon deck may face difficulty in calculating distribution for each level since both Sistormon cannot be in the digivolution chain. Jesmon or Dukemon cannot perform warp evolution to evolve from LV3 or LV4 to LV6 digimon, so a proper number of card for red LV4 and LV5 digimon is needed for the deck.