Thorns Macro for Teammate + Target's Target

[Rez-dark-iron]

Is there a way to make a macro for Thorns, and similar abilities, to cast on my target if friendly, or on my Target’s Target if an enemy?

So, if I’m targeting my Warlock friend, and I cast thorns, it goes on him.

-And-

If I’m targeting a DK attacking my friend, casting Thorns puts it on the Enemy DK’s Target. (my warlock friend)

[Elvenbane-veknilash (Elvenbane)]

@Elvenbane-veknilash

Base Healing Macro

Alt: Self Cast
Mouseover Friend: Cast on Mouseover
Target Friend: Cast on Target
Target Enemy Targeting Friend: Cast on Enemy’s Target
Default casting behavior. This condition also serves to generate the correct tooltip.

#showtooltip
/cast [mod:alt,@player] [@mouseover,help,nodead] [help] [@targettarget,help,nodead] [] SPELL

Pins are your friend.