It is possible to wall-climb up the mountains to the rear of Iceblood Garrison and slow-fall down on top. Here is a guide with some pretty pictures!
Although this requires slowfall, two of the main classes (Mage and Priest) who will benefit from this already posses slowfall spells.
For those without slowfall, you may not have heard that a while ago the cooldown on the Parachute Cloak was reduced significantly from 30 minutes to 30 seconds.
My apologies if this had been posted before, but a search resulted in nothing.