Millenniummon

Goal is to get Millenniummon/Kimeramon/Machinedramon into the trash quickly and pop off trash-field recursion. Having one Millenniummon in the hand is also useful for some bigger combos.

Egg digimon are to increase resources (card and memory) while trashing core cards.

Demidevimon is the main egg to level 3 monster with a beneficial effect by itself. By trashing my own deck, increasing resource access in the trash, and potentially netting an additional memory every turn or denying opponent cards.

Gazimon

Goal is to get Millenniummon/Kimeramon/Machinedramon into the trash quickly and pop off trash-field recursion. Having one Millenniummon in the hand is also useful for some bigger combos.

Egg digimon are to increase resources (card and memory) while trashing core cards.

Demidevimon is the main egg to level 3 monster with a beneficial effect by itself. By trashing my own deck, increasing resource access in the trash, and potentially netting an additional memory every turn or denying opponent cards.

Gazimon is the 2nd best egg to level 3 monster. Its' On Play helps card advantage with its' retaliation inherit working well with the Deltamon raid.

Gizamon is mainly for On Play to get core cards into the trash and gain +1 draws.

Deltamon is mainly to digivolve for draw and use as a raid tool with Gazimon to cheaply remove the opponent's strongest digimon at memory cost 2.

Kimeramon 

Insane Synthetic Monster - Memory cost 3 for cycle 2. Delay ideal trigger is Kimeramon BT18 with Machinedramon on the field - Can DNA into a Millenniummon from hand and get an additional Kimeramon or Millenniummon from the trash, including itself. Secondary target is Machinedramon BT18 - Can DNA into a Millenniumon from hand if Kimeramon BT19 is on the field and get an additional Kimeramon or Millenniummon from the trash. Tertiary target is Kimeramon BT19 - get a free Machinedramon from the trash (sacrificing one level 4 or level 3) and -3 cost a Millenniummon directly or a Kimeramon to DNA up if able. Machinedramon BT19 is an ok target to get a Kimeramon out for bigger combos or removal.
Millenniummon BT18 is a good target to refill deck and get a Millenniummon removal trigger + Millenniummon P220 blocker. Can also trigger Wicked God Descends into MoonMillenniummon.
Millenniummon P220 is a good target to refill deck and get a Machinedramon and Kimeramon back onto the field for board control triggers and lead-up into another DNA/XROS Millenniummon + Wicked God Descends trigger.

Wicked God Emerges helps draw at +0 and set up the trash. Can push Millenniummon into Moon or Zeed.

Wicked God Descends allows playing Kimeramon or Machinedramon at -4 cost to combo up. Ideally hits Millenniummon P220 with three Assembly targets for play cost 4 or Millenniummon BT18 with DigiXROS materials to decrease cost to 8 or 6. Nene Amano BT19 on-board will also help with DigiXROS. Can combo with other cards to access Moon and Zeed.

Soul Fear is a one-off removal for the biggest threats and boost to a boss Digimon to remove smaller threats.

Analog Youth helps with the sacrificing digimon to maintain memory and push eggs faster, plus digging for key digimon and filling trash.

Chitose Hiraiji allows to stack the trash for combos each turn, draw cards, and gain memory. This combos well with Matt Ishida. Also can access free Gazimon/Gizamon for additional effects and resources.

Matt Ishida is a memory setter that works with Chitose Hiraiji, the egg digimon, Gizamon, and Deltamon to gain an additional memory each turn.

Nene Amano BT19 is a memory setter that helps reduce the cost of Millenniummon BT18 and make the trash a better resource tool. Possibly remove to add a third Matt Ishida.