I think its a good idea to make it more noticeable for healers. BUT that being said, DV is one of the few abilities (actually the only ability) I have macro'd with a message (I'll emphasize, a short TWO WORD statement) and sound effect.

/micon "Divine Veil"
/ac "Divine Veil"
/p DIVINE VEIL
/p <se.10>

Just to be sure that the healer knows I've used it.