4th job Single Target DPS

I was looking through some stuff. For NLs the shadow works a bit different on bosses no? It isnt half of the bottom star dmg. It is a bit more. So it applies to shads too? And the 15% ignore tested by some people in southperry forums in another thread about it being additive apparently. Im also wondering if the random 10-20% dmg or w/e is with jaguar oshi can work on boss summons and get the dmg bonus and apply it to the boss? Correct me if im wrong with any of these info. I just wanted to get it cleared. Thanks.

Edit:I found out that jaguar boost doesn't boost wild arrow blow.