Looking at all these new cards with our older Impmons and Beelzemon, this is how we think the engine will run.
In early game, trash your deck as fast as you can. The original [BT2-068] Impmon and a slew of other cards should help you achieve this. When the EX2 Impmon is trashed as a result, he will waterfall the trashing. We want to trash as quickly as possible, and this includes trashing the original [BT2-111] Beelzemon as well (yes that's right). Our goal is to have 10 or more cards in trash in order to satisfy the warp-digivolution condition of our BT2 Beelzemon.
When the EX2 Beelzemon is trashed, we revive either the EX2 Impmon for searching, or the [BT6-068] Impmon to recover any BT2 Beelzemon that is in the trash. Your Impmon will be able to warp into BT2 Beelzemon for 4 cost, which can be discounted if you happen to have [EX1-071] Win Rate 60% in your hand.
Subsequently, when your Beelzemon attacks, you suspend Ai & Makoto to digivolve your Beelzemon into Blast Mode at 3 cost from trash, so in terms of memory efficiency we would have only spent 7 cost to move from LV3 to LV7, while launching a slew of deletion effects and big security checks at your opponent!
And on top of all these, these is still plenty of room for tech cards!