Will change in employer help? Filed PERM 3 times in a row getting RFE then denied and now selected for supervisory recuritment

An attorney Would need to review what has been submitted and reason for decision.

Is there anything I can do to reverse my husband's green card approval?

CIS is the agency that will make any decisions regarding resident status.

Your spouse's H4 remains valid as long as your H1B remains valid.

What are possible outcomes that will prevent for me losing my green card?

You and your Crimson lawyer need to work directly with an immigration attorney

Is it a feasible option?

Your employer is required to pay the prevailing wage.

Can I use SSI income for form I864A - Contract Between Sponsor and Household Member

A dependent may be a co sponsor but the dependent's income is not added to a sponsor's income.

After applying for social security number, do I need to stay in the country to receive it or can it be mailed to me?

it may be mailed to your US address.

After entering the U.S., what are the required steps for collecting my green card and social security number?

The green card is mailed to you after approval.

Amendment in process H1-B extension application.

Speak with your employer's immigration attorney. They attorney should guide you to the best way to proceed.

How can attorney speed up asylum case? how can they speed interviewing ? how can they speed decision?

An attorney cannot speed up your application.