the math is interesting but how does it actually apply to tanking? with endurance is easy to calculate but with absorb/shield its different because its not straight up mitigation since its a % chance that mitigation will occur. So you would have to calculate in your %shield chance (54% with ward up) vs your absorb chance (37%) in order to see the direct effect of 1 point of mitigation.
currently my HP is at 34.5k buffed as a shadow tank which seems to be enough to cover the 55 HM FPs (not sure about ops) so il probably use absorb augments and see how things go.
Also on mando raiders your supposed to keep the hounds out of the bosses red circle... other wise ya they get crazy buffed lol.
the slope i used for the calc is based on 1 properly balanced mitigation point. i did an updated one that uses the 5% damage reduction from slow time and the 4% from the skill tree... but i think i might be double counting the skill tree one in the new clac. either way the cutoff is between 2k and 2500 incoming dps.