Perk 1: Buff

Abilities:
+20% Health, +15% Target

Perk 3: Stronger

Abilities:
+40% Health, +15% Target, x10 consecutive Melee dmg

Perk 5: Resistance

Abilities:
+20% Health, +15% Target, x10 consecutive Melee dmg, 24% D.R. medium range, +12% D.R. when surrounded

Perk 7: Freedom

Abilities:
3% Health Regen per 5s, +10% Melee dmg / strike, Heal 10% with melee

9th perk glitched so I don't have the stats but basically it increases damage and health