First thing first, never blast scrapebox direct on your money site rather always use buffer sites like web.20 profiles, article links or bookmark links etc. Is you using buffer sites, then you need not to worry about quantity but still as we hearing these days that google is also penalizing over optimized sites, keep them under radar but rotating keywords or by adding generic keywords.
I normally do 8k to 10k verified links to my buffer sites in a week but mind you my sites are over a year old, if your sites are less then a year keep them around 5k-8k only.
Hope that helps.
Thanks