I think that there is no "bad" move for Dani, between backdooring either Brendon or Jeff. Both will benefit her in some way.
However, I think backdooring Jeff would be the better move simply based on the conviction of Brenchel in wanting to work with Dani from here on out.
Of course, then again, she sees how quickly Brenchel are willing to go balls to the walls to stay alive, selling anybody out. Partnering with them may not be that wise.
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ziggie ziggie wop wop