Employer change after EAD

[b4u108]

Hi,

-I work as a religious worker for a non profit religious organization (which has sponsored me for GC).

Following is my timeline-
-I 360 approved December 2017
-I 485 (employment based EB4 ) application submitted in Dec 2017. Still waiting to hear on that. 
-Received EAD/ AP combo card in March 2018, pending 'AOS' approval. 
-Applied for renewal and received new one in Jan 2018. My card is 'C09P Category' and under 'Terms and Conditions' says 'None'.
I am finding it difficult to continue in the present employment. So-
i) Can I work for another employer? ii) What if I take up another part time job? iii) What are my options?  iv) Can i take advantage of AC21?
v) Most importantly how will it impact the AOS application?
Could really use some advice on this.
Thanks in advance

[Keith Sanders]

@b4u108 What did you end up doing? I have a similar question!!