I just want to get a straight answer about the Elder Charms. Since different sites says different things.

Can you do a LFR twice a week and use coins on both kills for loot?

I know about World Boss. But about the LFR people say different things.

Soo would like to know if i wasted 5 coins last week on 1 boss or not. If soo why the hell do you get to choose if you want to use a coin if all you can get is gold anyway