I'm not on a PC at the moment to try it but according to the fare rules you posted, it certainly should be possible. I do this quite often with TK fares with very similar language in the fare rules.

Try it with a couple of actual booking sites and see what you come up with. Expedia and Priceline are both solid and should give you an idea of whether an OTA can do it with these AF fares or not. If all else fails, it'd be worth taking to an actual travel agent if the price different is that much. I often do a mix of TK A fares one way and J fares returning so unfortunately I had to seek out a real travel agent for those, I'm still waiting for the day that some OTA starts doing more advanced online ticketing, if it can be done in a GDS, no reason it can't be done online.