Quote Originally Posted by Giubba View Post
Because it last a fraction of time of rampart and shadow wall and it still have enough CD to generate hole where you haven't any form of mitigation. It's sustain not burst that's useful in trash pulls
The illusion of more mitigation in that case. The TBN window will provide your healer breathing room they don't otherwise have. I really don't think it's so logically (edit: AND mathematically) difficult to understand how strong TBN is.