Here is what I did send...
1. Please, make it able to mix Refine Runes into higher level Refine Runes.
2. For example, 5 Low-level Refine will give you 1 Medium-level Refine Rune. And same with Medium-level to Advanced-level. Since once you passed Low-Level refining, they just become useless, and still keep getting them from Anko quiz and GNW Packs and so on, which makes these rewards useless. Would be very nice to make some use of them, even if will be just 5-10 extra USEFUL Refine Runes. And this should not break economy, because 1 Low-level cost 13 Coupons/Ingots, but Medium-level cost 25 Coupons/Ingots.