Yes, you can use both required and invisible attributes in the same field. Use tuples () instead of lists [].

<field name="iwave_bill_to" attrs="{
       'required': [('move_type', 'in', ('out_invoice', 'out_refund', 'out_receipt'))],
       'invisible': [('move_type', 'not in', ('out_invoice', 'out_refund', 'out_receipt'))]
   }"/>

For some cases, I would rather use a boolean field with a compute. 

I hope this helps!