Your poll should probably be multi-choice; I voted it needs a buff, because I think as a weapon it needs to do some damage, but I might have also voted "don't make it a hybrid" simply coz I don't like hybrids haha.
However, the idea of mixing Arsenic and Owl's Eye like this is pretty awesome. And turning it into a duo would probably produce sucky nerfed Owl's Eye.
It makes me think that this would be far more useful as a solid
card though, since it's not much different to Owl's Eye in terms of it's CC ability, while death could obviously gains a lot from hard CC.
*Edit* Thematically, I think it's great that Air can poison its arrows, but doing so without
would be weird (as hybrid would allow you to do)