Oh my god.
This was definitely the hardest one, if not close second to Alm's. Not only are you kept out of attacking range completely on the right side, but that lance cav makes it impossible to simply go all-out on offense on the right.
I won't lie, I legitimately thought this was impossible...until I remembered I had Kagero: the perfect counter to both the lance cav and green fafnir. She already came with CC and the Maiougi from last year, I just had to add Astra and SS to get the win.