Vercure is not part of your rotation.

[Vincenti]

The only times i tend to use Vercure is when i happen to notice the healer struggling to keep the tank going during a large mob pull, or something seems to be hitting the tank particularly hard an the healer might not be fast enough to keep him up, so i use 1 or 2 an then go back to dpsing. Would rather see the party continue than having to come back from wiping because of something unexpected. Only takes a couple seconds to cast an you can make the dps up easy enough.

its not ever that im Vercuring just to do it, although i cant say much for other RDMs if thats the problem your having lol