Guild Wars 2

This condition can be powerful, but it seems it’s disproportionately effective against enemies who deliver damage in multiple rapid packages of small damage, and much less effective against enemies who attack more slowly for big damage. For instance a greatsword-wielding type will attack more slowly and do quadruple numbers of damage with each swing, suffering only a few hundred points of damage from retaliation, whereas someone who delivers damage using skills which cause multiple rapid hits per attack, or from multiple condition stacks ticking once a second, may deliver the same amount of damage over the same period of time but due to it coming in multiple small packages it will proc retaliation more times in that space of time and receive many times more damage.

The solution: instead of a fixed amount of damage scaling with Power (not sure why you use Power rather than Condition Damage for this condition, but that’s another topic), change retaliation to inflict a percentage of the damage you inflict, scaling upwards with power, eg. 20% at Power 1000 scaling up to 60% at 3,000. That way if you do 10,000 damage at your target you should receive the same amount of retaliation damage whether you do it in 5×2000 or 20×500.