2 ip is not enough to prevent your faucet to drain.. many ways to prevent it not only the cloud flare service can give it also the script of your site modify it and change some script to prevent bots to claim in your faucet also better to looks for the ip's in blocklisted ips that you can ad to your block listed..

Also try to get help in some well experienced already success in faucet here https://bitcointalk.org/index.php?board=212.0
You can start making your own thread there.. I already ask this before but i forgot the name that can give you some tips or service to protect you faucet from bots and tor claimers or proxy claimers..