Mangog Moderate Idea

Stats based on 5-Star 5/65, Sig. 200
Anything bolded is likely a change or something new.
Always Active

Immune to Armor Break and all Bleed effects.
Mangog suffers 40% Combat Power Rate, but gains 5% of a bar of power every second while below 2 full bars.
If struck while Unstoppable, gain a non-stacking Fury Buff granting +3009 Attack Rating for 15 seconds.

Hatred of a Billion Billion Beings - Max Stacks: 20

Mangog starts with 7 Hatred. Hatred is unaffected by Ability Accuracy and cannot be gained once every 0.20 seconds.
Gain +2 Hatred each time either Champion performs a 5-hit combo. Hatred gained this way inflicts the Opponent with a Stagger Passive for 7 seconds, nullifying their next Buff and all other Buffs triggered at the same time.
Gain +2 Hatred when Nullifying a Buff.
Each stack of Hatred grants the following:
+233.33 Energy Resistance.
+67.18 Armor Rating.
+60.49 Critical Rating

Enraged

Activating a Special Attack with 20 stacks of Hatred triggers Enrage, causing Hatred to fall off over 16 seconds. Enraged is paused during and 3 seconds after either Champion's Special Attacks.
While Enraged, each time Mangog would gain Hatred, Enraged is paused for 4 seconds instead.
Take 50% reduced damage from all sources except Damaging Debuffs. This damage reduction is halved against Special 3 Attacks.
Gain an indefinite Unstoppable Buff, this is removed when Enraged expires or if Mangog is knocked down by a Special Attack.
Gain an Indefinite Unblockable Buff during Special Attacks.
All basic attacks have a 70% chance to inflict a 14 second Stagger Debuff. A Staggered Opponent has their next Buff and all Buffs triggered at the same time Nullified.

Heavy Attack

Heavy Charging can be held for an extended duration and deals a burst of up to 13085 Energy Damage based on charge time.
While Enrage is not active, consume 2 Hatred to inflict an Armor Break Debuff for 15 seconds, reducing Armor Rating by 233.33. If an Armor Break removes an Armor Up Buff, Mangog gains +5 Hatred.
While Enraged, gain +220% Ability Power Rate while charging.
While Heavy Charging, Enrage is paused for 2 seconds and Mangog gains +30% Offensive Ability Accuracy.

Special Attack 1

On activation, gain +4 Hatred, this bypasses the gain cooldown
The second and final hit inflicts a Stagger Debuff for 21 seconds.
All other hits inflict the opponent with an Energy Vulnerability Passive, reducing the Opponent's Energy Resistance by 874.3 for 30 seconds. Max: 6
If Enraged, gain a non-stacking Energy Protection Buff, granting full immunity to Shock, Incinerate, Colsnap, and Frostbite effects for 15 seconds. This Buff is paused while Enraged and during Special Attacks.

Special Attack 2

Each hit deals 1177.65 Energy Damage.
The first hit steals the Opponent's Power above their nearest full bar, if they have less than one full bar of power, all their Power is stolen. Mangog gains 100% of the Power stolen from this attack.
If Enraged, the final inflicts a Stun Debuff lasting for 3 seconds that is removed when the Opponent is struck. Enrage is paused during this Stun if Mangog is Heavy Charging.
Only the first hit will grant the Opponent Power.

Special Attack 3

Nullify all Buffs on the Opponent.
Gain a Regeneration Passive healing +792.09 Health over 5 seconds. Every Buff that was Nullified by this attack increases the Potency of this Regeneration Passive by 100%.
If Enraged, this attack inflicts a Passive Stun for 2 seconds and the Opponent is Power Locked for 5 seconds.
This attack grants the Opponent no Power.
Once per fight, gain +4 indefinite Hatred. This will bypass the maximum amount of Hatred and will not fall off when Enrage expires.
If this attack causes Mangog to reach at least 20 Hatred, Mangog will automatically become Enraged.

Signature Ability - Empowered by Sin

Each time a Stagger expires naturally or is purified, Mangog has a 25.01% chance to gain +1 Hatred. Stagger Debuffs purified have a +15% increased chance of granting Mangog +1 Hatred.
While Enraged, Passively Regenerate 20% of damage taken by all sources except Damaging Debuffs.
Gain +78.5 Attack Rating per Hatred.
Gain 1% Offensive Combat Power Rate and +0.50% Ability Power Rate per Hatred.

Changed Synergies
Rage On (Kingpin, Immortal Hulk, Wolverine X)

Mangog: Activating a Special Attack inflicts the Opponent with a 10 second Suppression Debuff, reducing their Defensive Combat Power Rate by 3% for each Hatred on Mangog.
Kingpin: Gain up to 2 Rage Debuff when gaining an Overpower Buff, with each having a 50% chance to activate.
Hulk (Immortal): RAGE has a 70% chance to pause when the Opponent is blocking.
Wolverine X: Take 1% Reduced Damage from all sources for each Rage effect active.

New Synergies
Rageful Frenzy (Mole Man)

Synergy Members: Basic Attacks reduce Opponent's Defensive Combat Power Rate by 15%.
Mangog: Hatred no longer falls off while Enraged. Instead, each Hatred expires one at a time every 1.5 seconds and Enrage will fall off when reaching zero Hatred, nullifying a Buff will no longer grant Hatred. Additionally, landing Heavy Attacks will grant +2 Hatred and Opponents take Energy Damage equal to 20% of Modified Attack when Mangog Nullifies a Buff.
Mole Man: Each Monster Mass grants the following:
- 65 Energy Resistance (15 Mass = 975 Energy Resist)
- 55 Armor Rating (15 Mass = 825 Armor Rating)
- 1.5% Attack Rating