I would tend to agree with a Rascher-style (such as Caravan w/ Rovner Eddie Daniels lig) setup for a Keilwerth instrument. Those saxos feel so free-blowing, that I would probably gravitate toward a large chamber/close facing mpc with a harder reed to make the equation work out.
That's just me, though. I have a student who basically gets what he needs from a Selmer LT on his Keilwerth tenor and Rovner lig.
All this is pretty much splitting hairs....
But I like it!