Apparently you don't know the power of that song. In every situation where you can't flee but the others (your attackers, or whoever)can, you can use it. Think of invoker's quicksand (or any other of these spells), or when you are summoned in a locked room and your opponent is translucent. Or fighting in a group with a paladin tanking and his sanc falls. Or your groupmate gets focussed by enemies and you can do what you want (which is quite unlikely when you're hitting higher ranks though - I can tell you that - fucking scions :-)).. or something I found out while fighting Rhuean and Dwoggurd: it breaks the entwining .. there are just tons of situations where you can use it...
<br>By the way .. you get a fair chance of quaffing a potion .. there is a lag on the song, but it's the same with your attackers skills/spells/.. AND most important .. if the fight is going good for them they don't expect it at all .. believe me it saved my cute little ass more than once ..