Camouflage is meant to be paired with another cooldown so you you usually will pair it with heart of stone meaning you got a 20% mitigation with a 50% chance of an additional 15% reduction. Now look, I would rather it be a flat 100% chance to parry to remove the RNG aspect of it, but if you are complaining about not having the cooldowns for tankbusters that means one of two things.

1) You are waisting CDs and using too many.

2) Your OT isn't helping with your tankbusters, which is unexcusable now that every tank has a skill to help thier partner tank.