Deductions & credits

I have 2 kids in daycare, and pay $10k a year. I have never done the FSA. Is it a better deal to do the $5k in FSA, and tax credit of $1k, or just stick with no FSA and the standard credit I normally get? I don't know how the values work out in the end. I'm at the 24% tax rate. Does $5k pre-tax really make a bigger difference than taking the standard credit for daycare expenses?