Our alt run spent alot more time (and wipes) on spine than we did on madness. Madness is deffo easier. Setup being 1x dk tank, resto shaman/druid/disc priest for madness, and shadow priest for soaking impales. So 1 external cooldown. Impale is not the issue on that fight, at all <__<.
Spine 25>Spine10>MDW25>MDW10. It's a joke in 10 man, being able to ignore parasites on first platform and have 1 dps switch to them on second. Let them blow up with 25% hp, feel like a fly is scratching its butt. Don't need external cooldowns either, just go with 1 tank and a shadow priest takes care of the rest. A joke, really.