No... Karya are strong depends on how you used them.
They have a lot of advantage, seldom get stunned, fast runner, very long range & etc.
Karya are made for hit and run not for fist to fist. It is useless if you make them all equal. Every tribe is unique.
It is normal that you cannot kill naga with one SS only cause naga are build for strong defence but they are slow.
Same with yuda.
Karya's job is to hit the target with arrow not with knife.
Even in movies, archers are weak in short range, their advantage is their long range attacks.
On duel, I think people should make rules like no pots. Or maybe GM will disable pots during duel.
On war, there is no record in history that archer attacks alone.
So in my opinion, everything now is fair.