Red is fast when talking about attacking security, here we list out the combo with its cost for you to consider when forming a red deck. These numbers are not considered with support from Tamer or option cards or add-on DP from digitama or LV3 Agumon (if in use), assume the digivolution source is building from LV2 digitama.
Omegamon play in Red
DP : 15000
Memory cost: 13 to check up to 6 securities
Memory cost: 12 to check up to 4 securities
Ragnaloardmon in Red
DP : 14000 with Piercing
Memory cost: 8 to check up to 4 securities
Constraint: Legend-Arms LV6 is needed to save 3 cost to digivolve to Ragnaloard.
AncientGreymon
DP : 13000
Memory cost: 10 to check up to 5 securities
[ST1-11] WarGreymon
DP : 12000
Memory cost: 9to check up to 5 securities
Disadvantage: Low DP
Option and Tamer
Using Tamer (Tai Kamiya) to add security check and option card Scrap Claw to add piercing (deal with blocker) or option-jamming (Precise Tactics – deal with opponent's option card in security pile) or to add DP (Wing Blade).