In reply to Bob:
I thought E1 5b for the crux, but mostly a VS/HVS romp.
Route finding's a little tricky in places and don't get caught in a storm high up as you're quite likely to die.
An abseil from high on the route would take you down onto the glacier.
Abbing the North Ridge took us as long as climbing the Cassin as we kept jamming the rope, but I'm sure a competent party would do better.
The North Ridge doesn't face north so it can be very hot.