i feel that 3opts(or 4) items should stay as a reward for winning CS, not for gambling. Thats too much imo.
i would like to help you, but i have no idea how to balance this rewards.
for this cheaper prices should be group of items like bigger stacks of pots, maybe SD potions,
things that imo should be included as high "accesories" reward is TOCA, jewels, maybe OB1-3 feathers, crests....
and about weapons, just try to make this chance for toptier low enought to not break the gameplay 🙂