I meant more the general concept EX:

Iron Mat (iLvL 7 ) <- Base Iron + Material rank 4+ ( Assuming Iron Ore (3))
Hard Alm Plate (iLvL 7) <- Base Aluminum + Material rank 4+ ( Assuming Alm Ore (3))

Yes there is some over lap if you are to show it this way:

Iron Mat <- Iron Ore + Mat rank 4+
Iron Mat <- Iron Sand + Mat rank 3+
Iron Mat <- Iron Block + Mat Rank 2+

ect.

I think the first way if you can code it. Would be the most effective. And possibly a bit more space consuming.