Tanks:
There's absolutely no reason to use this (aside from the occasional 8 man raid that requires cheesing strategy. And that's not often enough).

Healers:
Only really use is if your entire party is bad anyways with mechanics (which happens once in awhile)

DPS Melee/Ranged: This is the only one they really need to know about.

That said-- someone mentioned earlier that the game doesn't tell you when to use it. So players would just assume it would be okay to use it whenever possible. (Having 7 other brand new players in The Chrysalis is fun when LB3 is used before meteor room lol)