"I play the way I want" -Randomperson

[Skivvy]

After the first few pulls, the whm asks the blm why he does what he is doing, meaning a question that can be reformed to "why aren't you using your skills in a way to maximize your damage output and mana regeneration"

That blm got hyper defensive, the more the dungeon progressed the lower got his damage output.

The whm explained the "best" rotation to which the guy said "I play the way I want"
And would not take any friendly advice given, going so far that he started insulting and trying to wipe us by messing with mobs.

I think it's very natural to get defensive if approached the wrong way. Asking "Why aren't you doing <this>" or "What are you doing?" are both negative ways to go about it, even if unintended.

If ever I feel the need to give unsolicited advice (which is incredibly rare - twice to date), I'll start it with a "Do you mind if I give a couple of tips? ^^; ". Makes people slightly more receptive vs. being on the defensive right off the bat. Whether or not they choose to listen, that's on them. I'll say my quick peace, and they can do with it what they will.