How to formulate the fine-tuning argument for the existence of God?

This article argues that the fine-tuning argument for the existence of God should have the following characteristics:

• It should be clear and logically valid.
• It should contrast the God hypothesis with a chance hypothesis as opposed to a single naturalistic universe hypothesis. 
• It should use the likelihood approach as opposed to ruling out alternatives.
• It should have a specific concept of God as a hypothesis as opposed to intention or design.
• It should have life-permittingness as opposed to fine-tuning as datum. 

Different well-known formulations have different combinations of some of these characteristics, but I defend a new formulation, which has all the characteristics.