I'm highly against adding fish for your cycle needs, I've done fish in cycles before having acquired all the great knowledge from the great members on this forum.
Don't ad damsels please, there highly aggressive and yes hardy, they will probably make it through the cycle and help the process of course BUT...
Your gonna want to remove them or it one day and it's gonna be a nightmare!! I say stay away from adding fish.
Fish food, a raw shrimp in media bag will work just fine. Also your live rock will have some "die off" which will help as well.
Just my opinion. Take it for what's it worth, 2 cents won't get a good cup of coffee anymore but it will still get ya some sound advice.
"When creating an aqua scape, strive for the beauty of imperfection, as its art and there is no wrong or right, it's left open for interpretation" James Findley