I am an MA and often time and sole healer in a team, in which i use /assist a lot to directly heal the person being attacked.
Works like:
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Fighting /Targeted RM Enf.
/assist -- Switch to teammate #1.
Heal.
/assist - Switch back to RM enf (assuming TM#1 is attacking him)
(8 sec recharge on heal)
/assist - Goes to me now since the RM is attacking me.
Heal.
/assist -- Can't assist yourself..
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Now the problem is with multiple mobs/temaing with neuts. I have to waste time tabbing around to the current target so I send the next heal to whoever the target is attacking.
If /assist worked on myself, it would be great....less confusion.
Of course you can't assist yourself, it makes no sense from a language standpoint, but this point of contention is outweighed by an increase in usefulness.
Of course, if there is some other way to target the opponent i am currently fighitng, please let meh know (not TAB key of course)