if you have previously equiped Exhaltation from the menu into your hotbar, all you have to do is hit the key say you put it in 2, just hit 2 and it will be used not matter if your running in passive mode or battle mode it will draw out the weapon and use it automaticly, now always keep in mind it requires the FULL stamina bar, so if your fighting and use it, wait for it to charge it will eat your entire stamina bar.
also if you have queued up skills you might notice a diferent beep sound when you try to use it, 1 type of beep means its been added to queue and another that you are queued up and need to try again.
Excellent information! I wondered why sometimes mid-battle when using Exaltation nothing would happen, I would be able to cast or anything. I just put this down to lag but checked it yesterday and was working a treat! Rate up.