Booking Aer Lingus Business Class using Amex MR points

Pointify is tracking this transfer bonus for the points-and-miles community.

Hello, I have hit a wall in trying to figure this out. More like a series of walls. I have Amex MR points and Amex is currently offering a 1:1.3 transfer bonus to Avios (BA, EI, Iberia). I am considering using my MR points to transfer to EI Avios and book a Business Class flight home from CDG-CLE. I for the life of me can't figure out how many points I would need to transfer. If you've tried this I'm guessing you've run into a simil