Hey guys, I like the part of this thread where you all discuss Alkan and Aesop's Feast.
Oh, wait.
Le Festin d'Esope is a very taxing work and requires lots and lots of chops. If you can't really take each and every variation by storm (as in, you have to do a lot of struggling), then you won't produce a convincing interpretation of it, because it's supposed to sound humorous, witty, and charming; not exhausting and like you're "reaching to the peak of your abilities" to get through it.
Regarding forearm strain, whenever you feel the burning, pain, or even a bit of fatigue, stop practicing. Stop, rest your arm, and don't use it until it feels better again. I've heard that you can put ice on your arm to help, but I've never had a serious arm issue, so I don't know for sure.
If you really want to play some Alkan, there's no shame in passing up one of the "biggins" for now. There really is some fantastic music throughout all of his output. I don't think Op. 35 No. 11 is to hard... It has a beautiful melody, it has that refreshing and uplifting feel because it's in the key of B major, and if you can keep from tensing up too much throughout all of the chords, it should be no problem! AND it should build up stamina for pieces like Le Festin d'Esope. It will also help with gauging a buildup and a leading to a climax and things like that.
Now, I don't know your playing, and if you really are at the caliber to take on Le Festin d'Esope, then by all means, do it!!