The way i look at it, i add 10% haste mediocre atk/acc and some DA when I use maneuvers while meleeing beside my pet. I only use the maneuvers however in-between pulls and not during a fight. Until our pets get strong enough to merit the time spent on JA delay though, karbuncle is right and its not worth it.

If a single wind took our pet to 40 % (25gear+15 spell that most people sit at) I would deem it worthy
If a single fire added the same atk to our pet that a bard can add to us (100ish) I would deem it worthy

Adding +20 atk at 90 is paltry and insignificant 99% of the time.