Fight mechanics don't change based on who you ask. The barebones basics like melees have positionals, healers have dps skills, all classes have aoe skills and so on don't change based on who you ask. Most guides have the same info and a lot of them cite each other or the authors collaborated in discords like the balance. I personally try to go around without the idea that everyone is trying to mess with me and feed me false info for reasons unknown, perhaps your experience has been different.
