The refinery is already a good improvement, but it definitely has room for growth.
My suggestion:
1) Please check the size of the refinery window -> around the window there are additional centimeters that make using it more difficult.
2) Add Prayer Stones lvl 4-6. Searching the inventory for the low-level stones isnt necessary, and splitting Stacks is annoying.
3) Add five uniq buttons -> "Normal Uniq", "Bril", "Intel", "Glor" and "Exc". For example, when you press "Normal Uniq", the system should automatically place two random identical uniq items from your inventory into the refinery. The current setup is a waste of time.
Thanks for reading and have a nice day