Toss this idea out here...
Matter Melding (randomly chance) gives slots on a price of armor if it doesn't work the gear breaks. Can only do this with Melding Matter. (DoH only) Gear can max any any number of slots.
Combining materia is when you have many types of materia and you combine them into one (Each Materia maxes at 5 combines) Just like melding materia can break.
Once you have 1 powerful materia you can equip it & remove it from any gear you want.
Combing many Materia at once will Huge Materia a level based on the stats of each materia fused within it. Lv4 Str+20 5= Huge Materia Lv20 STR+100
This system will allow us to use those useless poison resist materia's by making stronger Materias and allow players to swap them whenever they need for some special battles.
1.0~2.0 change over.
Players with 3 Materia melded on 1 gear will get 3 Slotted piece of armor and 3 combined materia on the first slot of that gear. Depending on a players total materia it will convert to most numbered materia.
Main require isn't creating the slots on the armor but creating a powerful materia to use.
This is more of a FF7 Crisis Core meets FF14 Materia system.