Afflictions with Follow-Up and Multiple Carriers

[SchmugginsTheDwarve]

I came up with a hypothetical super with Affliction(s) representing both injected venom and poison-covered spiky natural armor (like hedgehogs, which rub poisonous plants on their spines, except this guy produces his own poison). The character would have both Spines and an appropriate Striker or Natural Weapon (a venomous spike-covered tail).

Would it make more sense to give this character a single Affliction with Follow-up: Carrier (Active [Tail Spikes] AND Passive [Spines]) for +0% or maybe some higher cost, or would the character need to be created with two separate Afflictions - one with Follow-up: Carrier (Active) and another Affliction as a (1/5) Alternate Ability that has Follow-up: Carrier (Passive)?

Thanks!