I really do not understand why are you counting Ares here. I am not sure how many Scimitars were in the recce regiment, but there were at least 22 of them. So for 4 recce (Ajax) regiments there should be at least 88 Ares which covers for almost all ordered.
Also 85 infantry Boxers is just for first 523 ordered. There was no braking by version published for additional 100, but I guess some additional infantry should be included, question is how many and should it be enough.