Zaps are going to get nerfed IMO.
Wouldn't be surprised if healer on hero action was nerfed as well.
As much as I'd hate to see it, at least one of these two changes have to be made, and probably both.
I am
killing it with my current comp, netting upwards of 50k DE per day without a lot of effort. I'm gemming BK upgrade time otherwise I would be sitting on full DE storage 3+ days a week. I've found success in taking Whitewalker to the next level with controlled core dives, which are sometimes facilitated by zapping an inferno.
With a high-level queen, it really is too easy.