Hi, I have two of these babies http://lucy.allakhazam.com/itemswitheffect.html?id=47226, and they don't seem to increase the duration of Roar of the Lion (neither the heal part or the weapon proc part). Is that on purpose ? Sounds strange that the latest BP does not affect the latest spell ...
quick point of order - those are not separate parts. But yeah, no, BP focus doesn't extend dicho. You should be wearing a Darkened Fungi, probably.