IIRC i115 Bane + LB3 + tank's contribution is just shy of killing it depending on when you LB3. In which case it's actually beneficial to get one Flare in on the wyvern in the interest of getting your tank back to Nael a little sooner.
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I watched your video. One thing I think would really help is working on the positioning. My group always stands with our backs to the center regardless which way Nael is facing. For example, in your attempt, half the group stacked on the person Nael jumped to and half stood to his side with their backs to the center so there seemed to be some disorientation. My group marks the MT and he will always move so his back is to the center and Nael will reposition himself to face the center regardless which direction he is facing when he jumps.
I think you all will clear very shortly.