The kotail is my favorite unit in Tohaa. The mobility + survivability is just crazy. I feel you can create solid lists around him, partly due to his abilities, partly due to Tohaa's excellent support options. A basic example is I run double Kotails (SF + BSG options) with order spammed Makuals + F/O Kamaels triads and Auxiliaries. The triads provides E.Smoke when needed and are excellent units for supporting tasks, like button pushing/positioning grabbing, damaging WBs or CC'ing Tags. Basically E.Smoke blocking LOS + super jump/ prone/crawling across roof tops can give you the tools to create some very safe lanes for his 6/4 movement to get great angles on targets even in the back field or on roof tops. While S.mate + S.armour helps with random AROs or FtF losses and when yhe S.mate dies, the Kotail switches back to using his holo echo tools. Heaps of fun!