On a piece of paper, write down the deepest desire of your heart... whatsoever it may be that you want above all else. 

Fold and place within this small brass vessel, and it shall be projected unto all of the Djinns in thy care. 

Whatsoever you write and place within this enchantment shall be your proclaimed, professed wish, that they shall all work on to manifest, bestow, etc, accordingly. 

If something larger comes up, that is even more important, remove the previous paper and write a new hearts desire... an example could be, first you write “success in new business”... and this becomes what your Djinns focus upon... but then, tragically, a loved one falls ill, and you desire a healing. Remove the previous, and write a Wish of healing for your loved one. Once that is fulfilled, you can remove that written desire and replace with success again... this is about appointing work for each of your Djinns between spoken wishes, so that they can continually work upon a singular goal for thee that it of the utmost importance to thee. 

I have a similar enchantment, which I use often with my Djinns, with great success / results / effects. 

If you are a keeper of Djinns, such an offering will be a great blessing unto thee.