This macro below I used it to grab back enmity on "loose" enemy that went towards healer/dps by just using subcursor (using controller to play) without the need to manually select target (mouse users can use mouseover).
This will drop a Provoke and apply a Cross sign on target, then it will switch target back to your sign 1 but will lob a Shield Lob to the Cross marked target without changing targets, after all that, will remove the Cross mark. all these so you can continue gaining enmity on main target without too much targeting hassles :

/macroicon "Provoke"
/mk off <t> *replace <t> with <mo> for mouseover macro*
/target <t> *replace <t> with <mo> for mouseover macro*
/ac "Provoke" <t>
/wait 1
/enemysign cross <t>
/targetenemy
/target <attack1>
/wait 1
/ac "Shield Lob" <cross>
/mk off <cross>


Hope these help to start up our own macros needs~