Interesting lists, I find Eldar Highlander really hard to do, it takes a total transformation.
One thing though -- pretty sure Highlander doesn't allow duplicate formations, in which case Fenris has an illegal list.
You can just roll the excess units into the CAD which is fine, but you lose the bonuses for three units.
In my area Highlander games at 1500pts (even up to 1850), dont allow ANY formations, in which case they would all have to roll back into the CAD, not sure if that would work.
Anyway, thanks for the food for thought!