I've done that before on weaker mobs or solo/lowman things but in VW where you have a full alliance it makes disengaging and reingaging and using a WS before the wyvern hits to prevent breaths very difficult with lag and AoE etc. I was hoping for a pet command called like Refrain or something that increases wyvern attack speed/accuracy but disables automatic breaths on WS or magic but still allows restoring or smiting breath. This would allow the DRG to keep the Wyvern's TP stored to make better use of Spirit Link for that sweet 150% TP transfer every few minutes. They added the ability for Spirit Link to transfer TP but it's too difficult to use.