At this point, you out gear kara. If your healers are complaining about your damage intake, it must be one of two things. Either you're letting holy shield down and are getting crushed (can be unpleasant against prince and nightbane), or your healers are undergeared/lazy/incompotent/baised against tankadins/all of the above.
I'd probably figure undergeared or lazy. Your damage in Kara shouldn't be all that spikey, and healers with gear on par with yours won't have any problem keeping you up. That said, don't be afraid to use a health pot if the healers do seem to fall behind a bit.
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