The stocking is pretty good For after the tank is fully cycled. I’d skip the mandarin for now. You can have both a flame angel and a royal gramma. Add your stock slowly after the cycle is done. You should quarantine each fish for 30 days to prevent disease from getting into your tank, treat if needed. Only add one fish at a time after A full quarantine, except the clowns. Those you want to quarantine and add together. Add them in the order of least aggressive to most. Your fire fish is probably least with cardinal as a close second then gobi. Then if you go royal gramma I’d do that next with clowns next then angel Last.