These are all EToH Challenging towers and steeples (surprisingly there weren't any citadels). Only canon towers included. You have to type the full name of the tower, no acronyms, but you can type the full name without "Tower of" (For example, ToRER wouldn't work for insane towers, but Rough Endoplasmic Reticulum would work). They'll be listed in difficulty order from easiest to hardest.