Looking for a plugin/method of changing system parameters

[PKirkby]

I'm looking for a way to change this such as "Weapon Types" "Skill Types" Etc. As opposed to having weapons and equipment equipped in the game, I'd like all new items to be upgrades. So the player has built in slots on existing weapons, and can socket them to alter the performance of the existing weapon (like materia but changing the look and effects of the weapon)

I thought it would be neat to be able to equip any gem, like infinity stones, to any slot (armour, weapon etc) and have each gem affect each piece of gear differently. Thanks in advance!