Hit hard, hit fast.
Red Hybrid is the unga-bunga deck of the BT12 metagame due to how quick and simple it is to finish games.
With Beelzemon suffering a hit to consistency, Hunters and Red Hybrid have stepped up to take the spot of "Best Deck" and Red Hybrid is the deck that sets the pace.
New additions in BT12 allow for more aggression and filtering as well as tamers never being out of pocket should BT12 Agunimon meet his fate in the Security Check. The deck has new life in the BT12 Takuya Kanbara that gives you 2 memory back from a Security Check - allowing you to simple push for game with another Hybrid like BT7 and BT12 BurningGreymon.
BT4 Atomic Inferno is still the prospect and soul of this deck - allowing a +3000DP Boost and +1 Security Check for 1 Memory when played from hand, yet furthering the aggresion in response to it being checked in Security by giving ALL your current In-Play Digimon +1 Security Check!
BT12 EmperorGreymon brings new found fury to the top end - while its BT4 counterpart can Blitz, this new one can Delete 1 of your opponents Digimon with 8000DP or less. However, if you have a Red Tamer as part of its Digivolution sources you can Delete an Opponents Digimon with Equal or Less DP than EmperorGreymon! Should he fall in battle or by the hands of your opponent he can play a Takuya for free from hand or trash.
The Level 7 Lineup is very much your choice - I've gone for 1 Copy of BT9 DeathXmon and 1 copy of BT5 Omnimon as I wanted to make sure I'm prepared for whatever I may be facing. Hunter, Xross Heart and UlforceVeedramon fall at the prescence of DeathXmon, and Omnimon allows for a swift kill should I have shortage of memory for a Hybrid.
Give the deck a go! It's very cheap (not counting DeathXMon) and allows you to play at a pace that doesn't fear anything.
Just don't hit the Hades Force in security... :)