I would say that priority should fall in the following order:
1. Magatama
2. Mood (Scrolls)
3. Battle Armor (Cloth)
4. Battle Armor (Thread)
5. Refine Runes
6. Mood (Meat*)
Spend coupons on the items that GUARANTEE a stat increase first, then worry about boosting stats that are riskier, like refining and threads for Battle Armor. While the stats that come with refine and threads are great to have, it's not worth the coupons if you fail to upgrade.
I would put either Magatamas or Mood Scrolls first, because they are the cheapest investment per stat increase. For example, 135 coupons can buy you either 1 level 4 magatama in HP/ATK/NIN, which increases stats 106/71/71 respectively or 9 mood scrolls, which only increase your + mood by 21%, which depending on your base HP/ATK/NIN, could be better or worse than a level 4 Magatama. Also consider that Battle Armor Cloth for basic is only 13 coupons/item. However, since this is the second week of SA, you should have enough or close to enough cloths to approach level 9, meaning that Basic cloths will be obsolete. Medium Cloths are 38 coupons/Item, which isn't worth the stat boost in comparison to Magatamas and Mood Scrolls.
Hope that helps, Peace for now! :victory: