Mantra honestly took a long time for me to get into the habit of using because it was just sort of there; it wasn't important to me Doing The Deeps or really directly relevant to my personal survival. So you just kinda... forget it's there sometimes.

Goad? Ninjas don't know if you lack TP if you don't tell 'em, 'cause the game doesn't display your TP bars. Sadly.