I'm honestly not sure how I can get into the 3BPs, mostly because I'm pretty shite at levelling my Servants and only have a few more than halfway up third Ascension. I don't think I'll pull it off while she's on Caster mode, since my only single-target heavy damage Rider is Ushi, and I don't really have a good footing when it comes to stall/defensive Servants. I'm wagering whether I should swap out Mr. George for David or D'Eon.
Also yay for losing 8 BP because I tried the 3BP twice and only lasted around 10 turns even with save scumming, then two more just now because I'm a bloody derp and forgot I was doing the dailies.
Also also, apparently the banana's not immune to ID. If you pull off the miracle, it counts the entire life bar, so you'd burn down 6M in one shot in both the damage tree and the banana's health if you pulled it off in the 3 BP. Probably best saved for Rider day, though, since you'd probably have to stack two Assassin Shikis and a Saber Shiki, all with level 10 Mystic Eyes to have even the smallest chance to nail her on her Lines of Death.