Inequity, resonate and unfazed

I already know what willpower, coagulate & suture do and would love having them when I unlock and max out suicides so it will benefit my champions and reduce them from taking bleed damage. Despair would also be another mastery to unlock with the other two deep wounds and assasin and would also love going for them. What does unfazed, inequity and resonate actually do? Are those masteries worth having? If so, or if not why? I would like your inputs and advise on this.