Text command for Select Last Target

I'm trying to write a series of macros for some of my hotkeys that /ss; cast <heal, buff, boon, etc.>; then /slt (select last target -- or current target, however you wish to look at it) and keep on truckin'. Is there a text command for it?

I tried /sne, but it's luck of the draw if another enemy is near enough to get the target lock, and Then you have multiple mobs on you, which is probably not what was desired. And /cne apparently no longer works at all.

Any help, advice in this matter greatly appreciated in advance.

Cheers!
Kel

/cne has never worked and there isn't a text command for selecting the last targeted enemy, only the nearest one, /sne which is a kinda potluck as to which you get.