Use H4 has no confict w/ I485

She can either use H4 and AP to come back. Neither of them has confict with I-485 application. Of course there's tiny risk that she won't get H4. In that case, she has to wait to AP.

I would think you should go ahead for your own fingerprint first. The sooner the better. Who know what will happen to job and other things. One in family gets GC first is better than none of them gets it.