So far I've been fairly casual at PVP, and a lot of the reason is because I have trouble coordinating my kills, especially with pug teams. One of the biggest reasons for this is because I often can't tell the difference between blm/whm/smn. This is especially true if they are lalafells, shapeshifted, don't have their weapon shown, or aren't wearing a standard robe.

What should I be looking for. If I run out and see three casters out the gate, how do I know 100% that my target is the SMN, without wasting any time? I need something quick and easy to look for for each class, that helps me identify them without wasting a moment.