i did all your subjects except wihtout legal studies and added 4u maths except i dropped eco in the later stages of yr12 couldnt cope with the time required and ended up 10 units. Its doable and i suggest if you can to keep on doing eco/etc in case as a backup.
i really regret not studying hard enough during the school year cuz the internals rly brought my sccore down. E.g 94 for external and 87 for internal for eng adv .;x ended up with 98.55