I'd be willing to negotiate #4, but chain migration has to be on the table. It's fine when it's immediate family, but not beyond that. Also, there is no reason not to make sure everyone in DACA, etc., is a wonderful human being. After all, the whole idea is to let illegals jump to the front of the line, so we should be sure they're really as pure as the driven snow.
I think you have an unrealistic view of the ease with which immigrants enjoy "Chain migration".
As of May 2016, for most countries, unmarried children of U.S. citizens must wait more than five years and siblings of U.S. citizens must wait more than 10 years. People from countries with high levels of immigration to the United States—Mexico, China, India, and the Philippines—generally have longer waiting times. For example, married children of U.S. citizens from Mexico must wait more than 20 years for a visa to become available, and Filipino siblings of U.S. citizens currently wait about 25 years.
If the term that was originally given to the program, "family reunification", were used instead of "chain migration" ... it might change attitudes towards the program more.
But yes, like most things the American political system gets its hands on, immigration system with its country quotas is unnecessarily complex.
I agree that anyone who is illegal(undocumented) l but wants to "get legal" should have to register and apply, providing a history of employment education etc. Employers should be encouraged to be sponsors on those applications. I would envision hundreds of tribunals constructed to hear applications and approve or deny quickly. And the guidance for the tribunals should be a simple point system that provides points for 1) length of stay 2) age at entry 3) employment status 4) education level 5) employer sponsorship 6) criminal history and more?
I also think that employers who are found on the registry but aren't sponsoring the applicant should be called as witnesses. And if they are found to be a comany that has exploited illegals knowingly over the years, charged.