Its a crazy buff we are just not sure how big since rend has not been used in this version of the build yet. For starters you have a second damage that IMO will be a larger percentage of total output then ww damage itself. Just from the set bonus and ambos I could see at least 5 lvl grift increase. Then you add in lamentation and the knowledge we are missing about how Rend will preform exactly. Will we only get the base ability or can we have rend on our bar and select a rune for example?