Some people seam to have some truble thinking of ways to use there spheres together.

Here is a good way to get some ideas:

http://gaming.geoectomy.net/findrotes.php

It's a database of custome rotes people made....

there not all 100% acurate on the spheres you need, but many are spot on and can give you a good idea.

Here are some of the most common used rotes

http://dusk.wikia.com/wiki/Mage:_Common_Rotes

And here is a list of every rote provoded by white wolf in there books:

http://www.pen-paper.net/indices/wod/rotes.pdf

listed by name and showing what book and page they are on, and what spheres they need.