Yeah that guy was trying to promote Dragoon Gae Bulg a lot on his youtube. He was saying he’ll prove that Gae Bulg debuff doesn’t split damage into two but he never made a video to prove it. Yet I saw him playing earlier today at the event board in klai.
Also a side note in case anyone argues about this, yes you still do more damage but it’s not something like x2 damage. Your damage gets split into two and there’s supposedly a minor boost before the damage is split.
I wasn’t able to personally find the minor boost but it does seem that the damage is indeed split into two when i tried.