His Tankbuster did about 10k dmg on me, sometimes zero, all i used was Sheltron and Rampart/Sentinel.
.......................

so you had 48.8% DR from tank passive and cooldowns.

Your tenacity was 4% damage reduction.


4%.

That is 1.9% more mitigation than taking the "I want to do 4% more damage" option.

Totally worth it, that wasnt.