Adding multiple materia to a piece of equipment involves a random chance of the entire piece of equipment being trashed. This is a frustrating basis for a system.

I am not opposed to risk/reward, but when no skill is involved, it is frustrating. If I am to take such a large risk, I want to be in the driver's seat, trying to do whatever I can to ensure success. (Not press a button and hope).

This system rewards luck much more than it rewards effort.

If player skill was somehow added to this system, it would seem more reasonable. Alternatively, if the random chance was removed in favor of just needing to provide that many copies of the materia, that would seem fair as well. IE: Instead of a 25% chance to apply the materia, you just have to provide 4 of them.

As it stands, the few players who happen to get lucky gambling will have the best gear. The players who actually invest time and effort into this system (trying to make amazing gear) are still likely to never get that gear.

In this context, raw probability does not work itself out in a way that is fair. It instead, arbitrarily selects winners and losers.

I absolutely love the direction you have been taking with the game, but please consider this. Thank You.