Macro??

Hi,
im a healer, so i using macro to switch fast bwt targets so i dont leave my tank unattempt for long..
but for the life of me i cant make this one work:

/battletarget
/marking Square <t> (try with and without this <t> )
/action "Repose" <Square>

im using this to get some enemies that escape the tank/dps and attack me..

if i do it with the "fluid aura" works great...
if i do it without the mark, works..
????

Also.. anyone has any macro to put new mobs coming into the field to Sleep in a fast matter... (ps 3 user, so circling the enemies take too much value time from my tank, imh, noobie opinion)
i tried
/targetenemy
/action "Repose" <t>

but smt this goes for an enemy among the group the tank is aggroing, which i can imaging is useless / pointless..

thx