The best shell that you can get is your own,this way you dont have to worry about some hollier than admin telling you what you can and cannot have on your shell. i.e. saint,nmap ,hping or any other tool that some admin might consider a "hacking tool".
sometimes they cancel your account for having such tools .to avoid all the possible bullshit just install some linux and you can build your own shell to your likeing.

Criminal.