They could balance it by making the invisibility have greater advantages such as lasting longer making you harder to see and scrambling the radar. I think all of those together would be op but there's def room to make the hunter stronger by remixing the skill trees. I die more frequently as a hunter in pve and feel you have to constantly be moving and playing very defensively. In nightfalls you have to peek out, get off a half seconds worth of bullets, hope they are accurate and pray you get into cover by the end of the first second or death