Demon And Archangel Form
These 2 forms are one(two) of the strongest bonus attribute at the moment. Each form giving your hunter different attribute.
Demon Form : +30% Attack and Increase +300%(3x) Movement Speed for 5 Seconds.
Archangel Form : +30% Defence and Increase +300%(3x) Movement Speed for 5 Seconds.
So you can imagine if your DPS hunter using Demon Form and if your Tank hunter using Archangel Form, their value gonna rise to the top.
This Form Attributes can only be find or obtained by crafting Ancient and Primal Weapons, so good luck.