You claim this won't work in rated WZs, yet you have no proof to back that up. Theory is great, and fun, but it doesn't always ring true.
What I have experienced so far getting to 80+ valor as a KC shadow in stalker power modded gear:
Pre 1.2 : With any healer of my choosing we were unkillable without 5-7 people, and even then if we had good dps we would outlast them, add another healer and we never dropped.
Post 1.2 : More or less the same situation, unless there are 3-6 lolsmash spec sentinels. Even against that it though the TTK us is still long and they will lose at least 2 people in the process, add in good dps, and we come out on top.
I can take 60-70% of someones life in the time it takes a sentinel to setup lolsmash (which by this time I am not in range for but still in range to guard my healer, oh and the sentinels are taunted and have the slow time debuff up 5% still counts for something), healers aren't just standing there taking a pounding either, they have abilities to reduce the damage they take and also to CC.
Yeah I'm a little bit optimistic, but I base it on the experience I have gained, not on theory of what is to come. If things don't work out, I have plenty of BM+ alts I can use instead, but until then I will remain positive that my winning power can and will translate over to rated.