If you are playing in a server/chronicle were light users wearing heavy does not give you penalty, then if you are an archer, yeah go for heavy! Your evasion goes down, but you win a lot more p.def. But if you are a dagger, evasion >>> p.def most of the times, especially against archer! Light+ water song + evasion buff ==
Archer: Pew Pew Pew ---> ---> ---->
Dagger: Avoid, Avoid, Avoid. AHAH
:)