Like many have said, the difference between 95 and 121 dex is not enough to save you if they are with in hitting distance already. Even with alvarian clades.
you have to either run when you see them coming( they are still far away), or learn to block. If you turn and run when they are on top of you they will get at least 2 or 3 hits at your back. That will take more than half your HP down( vheelas have low hp) and then your stam will drain faster, which makes it impossible to prolong the chase.
simply put, when they are on top of you its almost always too late to run away. If terrain is very rough, and there are lots of things to jump on, then you might be able to get away with the alvarian jumping in combat mode claide. Otherwise running is futile.
Most decent fighters have a bow anyways, and even if you manage to put some distance youll get bowed down.