HF will be around 1MB/s per file. So if you upload/download some files at the same time speed will increase. Don't know about FS. But I am guessing speed will be a bit higher for Fileserve.

OVH isn't completely banned by HF. Only some IPs are banned.
It's because HF remembers the IP that ordered a premium account. So if you use the premium account on a different server HF automatically recognizes the IP change and blocks it within 1 minute.

Best solution is to order a new premium account from HF, just for downloading. Order it by using the IP of the dedicated server. Or you can try one of those (paid) proxy scripts that have been floating around, don't know if they work because I have never tested them.