Is asking a tank to use his enmity+ buff rude?

[Grailer]

Yeah probably forgot to turn it on after switching class . The secret is trying to tell them without making them appear incompetent and rage quit group in embarrassment .

I find it's usually best not to give advice unless it's asked for.

Same , from experience giving advice is sometimes a bad idea .

For example I was playing my bard and during a BOSS FIGHT
forgot to click mage ballad back off after whm ran low on mp .

This other bard gave me some advice telling me how I was lowering my dps by 20% .

I just quit the group instantly and thought to myself "Now you have 100% less dps from me beeetch!"

[Leiron]

I just quit the group instantly and thought to myself "Now you have 100% less dps from me beeetch!"

People such as yourself are a blight upon the community.
If you cannot take advice from someone who is genuinely trying to be helpful, then don't play an MMO game.
Play an FPS.