On horridon small adds die way too fast. Mid - higher adds personally I mut -> rupture -> mfd envenom and then maybe get enough muts in for another envenom. Even with redirect I don't see how a person can "shine" on horridon.
Rogues have a long ramp up time each time a mob dies. It takes awhile to build up 5 cp and after an initial opening on a mob I'm typically out of energy and then have to wait for it to build up to do stuff. Aside from trying to squeeze in a few more dps here and there on adds add dps is complete dog shit and the majority comes from burning the boss with a high damage modifier on it.
And the worse thing is just that the feel of the fight sucks. There's no rhythm. There's no extra skill. It's just hitting a stupid add and watching it die shortly after. Can't ever get going like you do when you're on a boss.
More over it's not fun at all. I don't think there's a non-masochistic rogue out there who loves add duty on any boss fight. And it's not just the lower dps it's just the fact that the game play on adds is really bad.