You can make the arrows easily in the propitem.txt and adding the bleeding/poison chance is possible to do in PropSkilladd.csv and propskill.txt for the custom SFX. So in the end all you need is the custom SFX for each arrow which is not really hard to get.
That would take me less than 5 minutes to do it in Resource.
The crystal defender seems not done yet. you should add an extra area for the dead players to respawn and buff/prepare themselves.
You can also add a Score board for the K/D of the players.
And maybe another map cuz this one sucks imo.
I like the idea of the crystal defender. If you put more effort into it, it can be a really good system such as eclipse flyff's Guild Clash for example.