This is the current build I'm running of blue flare, not playing more sourai because I dont have them, I would recomend replacing either the ultimate flare or the cocytus breath.
Ultimate flare is played because kiriha & nene is also a black tamer, and is a great card to have in security.
I would also take one kiriha out and one kiriha & nene in.
I believe that azulongmon ace is better for the deck since the goal of the deck is to play lvl 5 digimons, its more compatible, and with the right amount of memory it can also be a finisher.