/summonpet [pet name] -- if renamed, use that name
/use Spirit Wand
I can't /tar any companion, however, even outside the macro. I don't think it's possible.
Still, you'll get a hand cursor to select your target.
Note that if you have a summoned pet and it happens to be targeted, you'll waste the cooldown and dismiss that pet.
Guessin' the patch's date! 4/5th
"Tomb of Immortal Darkness" is not the incoming dungeon, it was a 2011 April Fool's joke. Go figure.