Can't post because level not high enough?

[Umo]

No need for quotation marks when the action is a single word, although you have to place them for actions comprised of more than 1 word. On a side note, in order to avoid writting mistakes, Auto-translation Dictionary feature works perfectly fine.
For the <tt> placeholder, it should work provided that 'target of your current target' is on casting range.

PS. Remember there's the command /mo used to cast actions on targets you're mousing over (both character on screen and name on party list). I've seen many healers claiming it comes very handy.