I'm a leather wearer with only a 1.5m CD ToK (which CAN be dispelled as well as bubbled) to protect me. Once that's gone, I'm basically a shitty Rogue and my only options is to kill my attacker or try to escape.
If you learn how to deal with my one trick pony ToK (stun me and run, snare/root me, pop your bubble, have healer dispel you, etc) then I'm pretty much fucked.
My Transcendence tick heals me for 20% over a span of 6s if I have the talent for it and my Healing Elixir talent heals me for about 1 CD's worth of damage. My self heal, Effuse heals me for 83k which is literally less HPS than just using a First Aid bandage and costs me Energy which means I won't be DPSing if I use it.
I much prefer PvPing on my Frost DK. The only thing they lack that I miss from my Monk is mobility. In terms of burst and sustained damage, as well as mitigation, they are a shit ton better than the WW.