User blog comment:Mineko Charat Lucky/Touhou LoL - Kaguya, the Eternal Princess/@comment-3564605-20160206005634

Kaguya sounds like she'd be an amazing AP-based tank... or at least very hard to kill! I can easily see a final build on her using: Sunfire Cape/Spirit Visage/Will of the Ancients/Rylai's Crystal Scepter/Zhonya's Hourglass/Mercury Treads (or Ninja Tabi, depending on who's doing better). Trade WotA for Deathcap if you want damage and Rylai for Liandry to help shred tanks.

Skill leveling would go like this: Q (Aja)/E (Robe)/W (Bowl)/Q/W/R/Q/W/Q/W/R/Q/W/E/E/R/E/E. Aja, Robe, and Bowl are all ideal picks for the laning phase as a passively build-in Cinderhulk/Sunfire PLUS an attack with built-in Spell Vamp PLUS a skillshot stun akin to Elise means trading is painful vs Kaguya. If you want to enter laning phase safe, take W (Branch) first, then Q (Aja), then level normally. Swap out Robe for Ilmenite or Mysterium if you feel Robe's pushing lane too hard. During the teamfight phase she can trade the Bowl for the Jeweled Branch and begin initiating ala Annie.

Kaguya can also go Support, if only due to her W via Jeweled Branch/Kinkaku-ji. W/E (Mysterium)/Q (Cowrie)/level normally and swap all the AP tank stuff for Support items like Frost Queen, Crucible, and Randuin for the opponent to have a bad time. She *can* also go glass cannon and dump all her item stats into AP/CDR/Magic Pen and watch as she roasts people alive with Robe of the Fire Rat...