So I'm making a Naiad watersinger (yes I know they should be undine only but I'm planning to twist some arms) also Naiads are kewl.
I was wondering if bonuses to hit and damage from such sources as inspire courage, heroism, good hope, haste and so on would effect Waterstrike. One does tend to consider these things given its a bard... they tend to have a lot of buffs floating around.
Would make quite the difference to between the ability being a useful offensive option (if they do) or probably only really good for the flanking bonus it provides.
Splash splish?
Waterstrike requires that you be using the watersong performance, preventing you from providing Inspire Courage.
It is not clear if Inspire Courage from another bard should aid with the Waterstrike, but I would let it. It is certainly an attack roll, but it is questionable if it could be considered Weapon Damage. I would consider it so because it has a type -- bludgeoning damage.
Lingering performance is a thing.