1) There is no ready to go thing. Acis is a good and cheap option to start with and you will probably find developing services easier since its a common project for everyone.
2) Yes almost all antibots are useless vs smart adrenaline users, however an antibot is not just a protection vs adrenaline but a shield vs many other 3rd party programs and cheats. Moreover, it provides useful tools like HWID and more. Bottom line, don't even try without client protection because you will end up crying for mercy.