Is the following a safe and effectively worded request to achieve what is intended: “Decrease the functioning of alien Greys, hybrids, and human clones, in a safe manner, to lessen their effectiveness in carrying out harmful alien plans?” Are any changes needed to improve it?

This will work just fine as is, because it specifies the targets, the intended actions, and the considerations needing to be given for maintaining safety, to balance the benefits against the possible backlash from stirring up too much interference in the wrong way at the wrong time, and starting a witch hunt going to find who is responsible for interfering with their property. So this leaves things open-ended for the divine realm to be judicious in the application, considering human needs and vulnerabilities, both.