So I did test a bit with damage reduction from Zane Skills, Rough Rider and Distributed Denial.

Testing was done on MH3 True Vault Hunter (which might skew results). I was mainly interested in how different DR values work together and if DR from shields (or other passive bonuses) are added to Zane.

As a test I wrote down shield damage without DR from a Skag (lvl 51) and then wrote down damage numbers (all melee, no visible MH bonuses) after changing gear stats.

Base damage: 1624

23% (RR) DR: 1250 ( 76,9%)

23% + Barrier: 1120 (68.9%)

16% DR (SUL): 1359 (83.6%)

15% DR (FB): 1377 (84,7%)

23% + 16% (RR+ SUL): 1046 (64.4%)

23%+16%+Barrier: 938 (57.8%)

16%+15% (SUL+FB): 1181 (72.7%)

16%+15%+23% (SUL+FB+RR): 909 (55.9%)

16%+15%+23% + Barrier: 814 (50.1%)

This shows that Zane clearly does get added DR when near the Barrier (only when Barrier is deployed, carrying it wonâ€™t give any DR), which should work for other passive shield addons (e. g. 40% chance to absorb ammo) as well. It could be 50% (things that are skewing results can be MH, TVHM and a level difference of 1).

Also the game does not seem to calculate DR as in Borderlands 2. 1/(1+DR) would give a lot less DR. Those numbers could suggets that and DR is applied multiplicatively ((1-RR)*(1-FB)*(1-SUL)). Numbers donâ€™t add up perfectly but would be much closer than compared to the old formula (about 1 percentage point difference in most cases), though the difference between observed and expected results is still pretty large when adding more sources of DR (but a Zane bonus of 40-50% might fit with those numbers).