Since you are obviously quite capable in doing your own research, why don't you go to divorcenet and find out which state would be better for you given your situation. Or you can sit around and debate the validity of your position that you can file in either state, although you only live in one. That one of the parties, at the time the action was commenced, was domiciled in this state, or was stationed in this state while a member of the armed services, and that in either case the domicile or military presence has been maintained for ninety days prior to filing the petition for dissolution of marriage. The conciliation provisions of section 25-381.09 and the provisions of article 5 of this chapter either do not apply or have been met. The marriage is irretrievably broken or, if the marriage is a covenant marriage, any of the grounds prescribed in section 25-903.
Filing is based on residency.
Even in the military, you have a home state. She is domiciled in Arizona, you are domiciled in Washington. That one of the parties, at the time the action was commenced, was domiciled in this state, or was stationed in this state while a member of the armed services, and that in either case the domicile or military presence has been maintained for ninety days prior to filing the petition for dissolution of marriage. The conciliation provisions of section 25-381.09 and the provisions of article 5 of this chapter either do not apply or have been met. To the extent it has jurisdiction to do so, the court has considered, approved and made provision for child custody, the support of any natural or adopted child common to the parties of the marriage entitled to support, the maintenance of either spouse and the disposition of property.