In Eureka last night, I clicked on the wrong hotbar and ended up using mana shift. Not a big deal, it just triggered the macro I have for it. Tells who it goes to and two minutes later alerts that it is ready again. Someone in my party informed me about /echo (wasn't aware I could do that, such a newb) and I said good to know, it was more for my raid healers when we first got together to know when they could ask again. His next statement was I should use it whenever it is ready, especially for AST.
My question is should I just go ahead and use it once it's finished cooldown? Myself (blm) and the rdm in my group only use it if the healers ask, which tends to be when multiple people get killed and need raises. We have an AST in the group but she manages her mp pretty well and we only need to assist her during dire emergencies. How have other people managed their mana shift ability?