Why I have no interest in Coils more specifically, T9.

[Ashkendor]

Imo it's becoming primitive to look at strategy videos for MMo fights. It would be better if they explain what to do when you get into the dungeon.

I'm not sure what you mean by "becoming primitive" but it isn't really reasonable to expect people to explain the entire strategy in a fight like this when you get into the instance. The mechanics in a lot of the Coil turns are simply too complex to give a breakdown all at once. Each phase tends to have completely different mechanics, which can make for a very confusing explanation if you're trying to go over the whole thing all at once. Sitting down to explain phase by phase eats up a significant portion of the limited amount of time that you have to complete the objective.

It's one thing to go over a few things where strategies tend to differ (placement of Bluefire and who handles Redfire in T12 is a good example) but to explain the fight in its entirety just isn't reasonable for a duty finder party.