I would say let ride on the current yeast until it bumps up against that alcohol tolerance, which I suspect it will do. Then, get a big starter ready of WLP099, super high gravity yeast. Pitch the big starter at high krausen and you should be able to dry it out some.
I can't be arsed to keep up this list of what's in the fermenters, but hey, check out the cool brewery I own!
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