Clemency and Interruptions

[Reynhart]

On a side note: Sentinel having 10% more mitigation than its counter parts is irrelevant as it has lower overall damage reduction than vengeance for example. (Taking amount reduced over its up-time against its downtime.)

I still don't understand why people calculate mitigation this way...average mitigation is not relevant because you don't use mitigation cooldown for auto-attacks.
Sentinel reduces 10% more damage than its counterpart on one tankbuster and neither cooldown will be ready for the next, so it's better.