Be aware that there is another concern to overspacing the shock other than having enough thread on the top hat of the coilover.
You'll never want to space the shock enough that it becomes the limiting component in uptravel. That is the concern of the LCA and bump stop. There's been people on the Tundra forums that have stacked multiple spacers, only to catastrophically destroy the shock. Where that limitation on the 200-series, I'm not sure. Definitely the factory spacer is fine. Perhaps even a washer or two.
May also want to be aware, that some rake is good in that it helps when hauling heavy payloads so the rear does not overly squat relatively to the front. If you do haul anything, airbags might be good to help with load support.