How do I get the most out of Starshards?

I was playing with builds, and was avoiding increasing damage just for holy spells or shadow spells, because I like Starshards because they are cool and want them to be useful, even though there are better options.
I thought having both divine spirit and spiritual guidance would be best. Starshards makes use of Spiritual Guidance, right?
I know force of will gives 5%, but I can't make use of its critical bonus with Starshards, because it can't have critical strikes as far as I know.
Power infusion might be okay, but I prefer more consistent damage, and would prefer passive things.
Thoughts?
I thought having both divine spirit and spiritual guidance would be best. Starshards makes use of Spiritual Guidance, right?
I know force of will gives 5%, but I can't make use of its critical bonus with Starshards, because it can't have critical strikes as far as I know.
Power infusion might be okay, but I prefer more consistent damage, and would prefer passive things.
Thoughts?