When I first saw that an ENC could use this (first pet Focus item I ever saw that wasn't NEC/MAG/BST only), I wanted nothing more in all the world. I tried camping it, but without much success.
One day, some Guildies were running around in Valdeholm, whacking everything under the bridge (where Dentrik spawns). Knowing I was slavering over this, they sent me a /tell when one finally dropped, around the 3rd or 4th spawn. (Thanks to Braivheart & Bamaden!) So, I hauled butt over and snagged it.
As of right now, this has NO effect on Enchanter pets. I was betting good money that it wouldn't. But since it was All/All, I was praying that, perhaps one day, it would affect our pets. According to Kalysta's post below (or above, depending on sort filter), that hope is not in vain.
I still carry it around with me, even though I have a much better Range item already. I still equip it when summoning a pet, just for giggles. I look forward to the day when it'll summon a DB pet for me. Until then, Shiny Bob will continue to be the HP-challenged Cuisinart that he is. =)