You can't go for something "great" right now.
The best build you could make should be:
Leader: This is tricky. You could run Slayerdramon for half dmg + some dmg, Ladydevimon for its vampire
Lowe to generate wild cards or Queenchessmon for half dmg + attack (which is higher for her, cuz its "most" compared to large of slayer) in less turns than slayerdramon.
Either blitzmon (more defense) or dynasmon (unresisted dmg) as all 9 (both activate their skills in 5 turns)
Omegamon Zwart as +2.
Last slot depends on what you want: Queenchessmon is a reliable 6 turns half dmger which should be your best ally if you avoid slayerdramon. You can also have both to have half dmg more frequently. Craniunmon activates faster but only reduces 25% of the dmg, hence queenchessmon is better. If you max lvl Skullgreymon vs Greymon, it could become a good attacker if you already run queenchessmon.
Advices: Blb that queenchessmon, make another one by evolving. 5 turns half dmg is something not to try to avoid. After that, make shakkamon blb also, he could be useful. From there, it depends on the digis you'll get after sometime of farming.