Impale ignores mitigations.
It does damage based on how many bleeds are active and 2 out of 4 reaver bleeds are on a longer cd than their duration, so when you see that you have enough active, you could kite the reaver until they've worn off, reducing the damage impale will do. Tactics like this were quite common before U10, when many good burgs were relying on trick kiting to beat reavers without CDs.
[center]Let our actions speak for themselves. Jinjaah has been pouring over every post in the Bullroarer forum. Please keep in mind that any experiences with previous LOTRO teams are not reflective of the current team, give us a chance[/center]