Spros in Flyff are absolutely necessary.
The success rates once your item is +4 or 5 drops so much that it's
almost impossible to get it on your 1st try. And without Spros,
failing your 1st try = item disappearing. So Spros are necessary
if you want to have a decent weapon or armor x_x
Note: Some people have tried as many as 120 times just to get
an item from +8 to 9.
Spros in Flyff are absolutely necessary.
The success rates once your item is +4 or 5 drops so much that it's
almost impossible to get it on your 1st try. And without Spros,
failing your 1st try = item disappearing. So Spros are necessary
if you want to have a decent weapon or armor x_x
Note: Some people have tried as many as 120 times just to get
an item from +8-9.
Or it could just be your item doesnt get destroyed when you fail (which would leave spros unneccessary).
Anyway, I think the success rate of upgrading in this game is rather high, at least until +5, because I've been seeing many screenshots and hearing many stories of +5 weapons.
Everyone says that bad things companys being in it just for the money. Well for those of you who are slower.... OF COURSE THEY ARE. A company like Outspark is first and formost a business. What do business' like to do? Make money so they can live.