Rogue Miner is meant to be used for SHA256 and Scrypt currencies. If you don't know if your currency is supported or not, feel free to ask or make a search for the algorithm behind it.
Note that Rogue Miner should be considered a basic miner to learn how mining works without having to pay any time based subscription. Getting a lifetime package like the one being offered here allows you to start mining without any extra cost.
Rogue Miner executable can be run on unlimited computers. If you own multiple servers you can safely distribute this applications and run it on all of them at the same time.
Given that there's no "best pool" in general but it depends on the coin you're mining and the trade off you want to achieve, Rogue Miner is mainly meant to practice with LTC or DOGE.
Rogue Miner builder is completely web based and allows you to create builds wherever you are, even with your smartphone. All you need to do is connecting to builder website and configure your miner, we'll compile it and provide you with a ready to run executable.