As some of you probably already know the last two WoD stacks of Tyranny of Dragons boons are bugged. I've checked that with Dragon's Fury boon. The first stack raises you critical severity by 5%. And it works. The next stack (implemented with WoD patch) should raise the critical severity by 1.5% but it's only 0.2%. And the last stack should also give you another 1.5% but it's only 0.1%.
So when you choose to max all 3 components of the last Dragon's Fury boon you get +5.3% (5+0.2+0.1) critical severity instead of 8% critical severity (5+1.5+1.5).
Comments
Because not everyone reads the bugs forum, so posting here allows other people not to make the same mistake and have to respec out or wait forever (if ever, e.g. deflection severity) for it to get fixed.
Thanks for posting Liauss