If you want more 'respectable defensive cooldowns' then you will lose damage in order to maintain balance in the game, im sure you'd make a new post later if this finds place where you complain about the low damage you have.
I have a DK myself so this is in no way a 'LOL DKS ARE OP' comment but what i said above is basic logic because currently DKs do insane damage (on cloth its ridiculous) along with other meele but thats how it is currently. Maybe your surprised in upcoming patchs.
https://twitter.com/Ghostcrawler/sta...90372927201280
Seems they lowered asphyxiate CD now.
dark simulacrum need to be replacing because random spell cant make the game more balancing.you need gladiatorlosa for copy poly,cyclone etc...