This setup is stupid. You have nothing to buy (except dumbed down weapons, even if the Tranquiliy is a fun weapon) with and it is capped at 5000 so after a while it is wasted. Either put something in the shops or raise the limit.
Personally I think there needs to be more consumables purchased with A7, and I don't mean one-off purchases. Infradine is a purchasable consumable, but it costs just 3 nanites. As it was purchased with A7, its consumable currency should be A7. Just like all the tactical slot items purchased with Merit require Merit to use.