How about chaning the player-granted anti CC buffs to a 2 buff system like the following (excludes the immunity gained from breaking a cc)?
Major Immunity:
Grants immunity to the 6 next hard cc's (stun/knockback/pull/fear)
- Granted by Immovable
Minor Immunity:
Grants immunity to the 6 next soft cc's (slow/silence)
- Granted by Rapid Maneuver and its morphs