I generally never use any animation priority lower than Action. Lower animation priorities for the most part seem to be useless unless you’re modifying the default character animation or movement systems.
This means every time I open the editor I must set the priority to Action – and frequently I forget, create a whole animation without changing the priority, then wonder why it is doesn’t work in playtests (hint: being overwritten by character animations which are higher than the default priority). It’s an unnecessary hinderance that wastes my time, and I can see it confusing newer developers too.