I don't know the exact ACL line limit on Aruba Instant, however, 175 ACLs in a single role doesn't sound good to me for maintainability reasons. It's probably a better design to simplify the ACLs and combine it with firewall rules on your firewall.
In case you need more help, it's probably best to either work with your Aruba partner or local Aruba SE, or share more information on what you intend to achieve with this size of ACLs.