Originally Posted by
Toroq
Not sure what "UGing" means, but there's relatively few bosses where I would consider using WBR over KB.
WBR is "decent" on a lot of bosses, but it's really only strong on Xhul, Mannoroth, and Archimonde (and as brought up by Eman on the last page, WBR being strong on Archi is pretty debatable).
Unlike the poster above I wouldn't say TTT is necessarily stronger than KB defensively (and at any rate, definitely not "way" stronger) unless the boss timings really favour the 2 min on-use CD, but it's definitely stronger in terms of DPS when combined with the legendary ring.