Perhaps if you kill x number of pirates without dying you could get killstreak bonus where you glow a particular coloured aura that looks cooler and changed colour depending on how big the streak is.
This could also reward you with a very slight hp regeneration rate and stamina. Not overpowered though as its important to keep things fair, but a slight boost to regen, maybe base health and stamina, making these players who have the streak a priority to take down.
Even if we forget the buff and just have the aura visual effect.
It would be nice to stand out for being particularly fortunate in an encounter.
