H1 Transfer to New company while PERM is pending

[Vama23]

I am currently in my 6th year H1b which is expiring in 8 months i.e till 01/03/2019 and my current company has filed my 
PERM application in January 2018 
A very good job opportunity has come my way and they are ready to transfer my h1 . 
I want to switch to that company and am not sure what to tell their Immigration lawyers 
since currently my PERM is pending and my H1 is valid for 8 months

1. Should i go ahead and tell the new company to file my h1 b transfer since it will be filed in regular processing ( premiere 
processing is suspended till sept) and meantime my PERM gets approved and i 140 is filed in premium  (IDEAL situation)

is there something i can do without jeopardizing my immigration status and joining new job?

Please Advise.

Thanks in Advance
 

[V S]

Premium process suspended only for the new H1 petitions filed this year not for existing H1b’s.

Also , priority date will be locked only 6 months after I 140 approval. With in 6 months company may revoke it.