Replace the broken elevator in Clockwork Terminals with a Mineral Alchemy Machine. Blue Shards, Red Shards, etc. can be crafted into their respective minerals here at a 10 shards to 1 mineral rate. You can also craft Minerals into Alloys here for use in changing Arcade gates. For example, one could use 15 Crimsonite and 15 Dark Matter to craft a Fiend Alloy.

Basil in Clockwork Terminals now sells Alloys in addition to his recipes. Each alloy can only be purchased once per visit, and he only stocks those which contain the current stratum's Anti mineral (in the current gate construction system) as an ingredient. For example, a Fiend stratum Basil would stock a Slime Alloy, Undead Alloy, Construct Alloy, and Fire Alloy.

Gate construction made simple: Each stratum has an alloy value, which begins at 0 and is increased by 1 each time an Alloy is deposited. The stratum theme with the highest alloy count is chosen when the gate is finished.

And finally, each player can only deposit one alloy per stratum (for a total of 5 alloys per gate), emphasizing cooperation between players, rather than one person with too many minerals changing a gate by themself.