[Unanswered]  Lost Longinus KO/Burst Attack?

On my Lost Longinus draft on the wiki forum, the opinions seems split on whether or not Lost Longinus is only decent or incredibly strong for KO and Burst Attack. Which do you think it is based off of personal experience?

On a lesser note, L2_H combos, some people are telling me it's spin equalization and other tell me it's Burst/KO attack. Anyone have any videos in that combo's performance or personal experiences?