I imagine it would have to be so on slow or there wouldn't be much reason to use it. Would just give your opponent better regen.

Also, shadow stride. I've had it on a svirf (explorer), dexy human (explorer), and dexy half-drow (hunter). The svirf did not do nearly as well tanking so I would assume dex plays a role. Hard to tell the difference between human/half-drow because the hunter tanked like a beast whether in the caves or not.

Note: I don't think rebounding strike works with bows. At all. I spent a lot of time in Arangird and pretty sure I never got a single one. At the very least, it doesn't fire on the archery based dodges. The human explorer tanked ALMOST as well. However, the rebounding strike more than made up for it in the offensive department.