Aurora is a minimum 60k+ heal in good gear, more with crits. It is the equivalent or wars equilibrium in healing, its not a small amount. Making camo have that change you suggested would make camo way too strong, it'd be stronger than rampart even though it is bonus mitigation. You should always be cycling your cooldowns in dungeons anyway, and if you have 200k health your gear is good enough that if you mitigate properly you should barely need healing in dungeons anyway.