Would Radiant Silvermail and other Angelic-themed armor pieces affect the sight range? Also, what effect do the Graviton/Electron vortex lines have on light?

Getting cursed = Instant lose condition

To be frankfurter, this should not simply be another Clockworks floor. It should be its own stratum/boss series/miniboss trap. Think of Amnesia.

The minimum range of one space radius is essentially being able to see your hand in front of your face. Since our eyes are basically lights this works, whereas in reality our eyes do not generate light and in complete darkness vision becomes more difficult. Seeing as most floors are lit by something which cannot be manipulated it would be easier to stick with fog for these floors. It makes the whole setup less complicated than it needs to be and allows for a single set of rules rather than flying around with your toes in your ears. Candlestick Keeps already have a lighting system to use so repeating it for something which can be its own setup would be redundant.

The significance of torches in floors they are currently present is void; they might give you a heart or some money, but otherwise they do nothing. With this new fog system there would be a reason to keep them. In Candlestick Keeps the candles have to be relit by weird orange blobs, but with the torches they are lit by default and stay that way unless someone breaks them. Was it worth that heart or few crowns to have less sight? The radius of light seems exaggerated, though floor size and layout would determine this; also how many torches are in the map.

Having only certain weapons, especially the more commonly used ones, have extra benefits would further punish users of less commonly used weapons. I know it would be logical to have weapons which create light assist while in fog but it would give distinct advantages which would further unbalance the game. However, that does not stop you from creating a lantern based object. Go to the bottom of this post for more information on the lantern.

Having statuses when they are afflicted influence visibility is well played. Again, the lit radius may be exaggerated depending on floor size and layouts; the majority of the map is supposed to be fogged out while certain areas grant light. This would create a sense of fear in players as they walk through unsure of what is hiding in front of them. By the Oiler reference I assume that if anything, enemies included, are afflicted with the status it creates a field of vision. More Polaris/Brandish/Firotech/Vaporizer spam. However, no one is going to stop you if enemies afflicted with the status create a slightly visible glow due to the status through the fog showing where they may be. Otherwise it would become a Polaris sausage-fest. If a knight is inflicted with a status the effects you delegated may apply, but if an enemy is afflicted the best you get is seeing the animation for the status through the fog if it is bright enough.

Mineral bonuses would be silly. Go to the bottom of this post for the reason.

To further create the suspenseful ambiance, there should not be any effects on your vision due to the mere presence of an enemy. Otherwise you know what to expect. If your radius suddenly shrinks you would know a Trojan is nearby, spoiling the part where you suddenly realize a Trojan is nearby.

And now, for what you may have been expecting, the lantern. This object behaves similarly to a statue used to hold down a pressure pad, large enough to have to pick up and hold over your head to create the field of light. Rather than give knights a whole four space vision radius without anything effecting them, bump that down to two and make the lantern create a light radius of four around it. The lantern can be picked up and carried, but while carrying your movement speed is lowered somewhat; not as severely as Graviton/Electron charge, but between that and average movement speed. At least one knight could carry this lantern, though it is optional to take it with you, keeping a larger field of vision for the knights who are standing with them. This way freelancing/running off alone would be less favorable due to the diminished visibility. If you stay with your team you can see, but if you run off alone you can see far less. While holding the lantern your movement is decreased and you cannot attack because you are holding an object. You can still move around while holding it, but your main duty is keeping the large radius of light. Enemies are not necessarily attracted to the light but the majority of enemies in the Clockworks have an aggression range of around seven spaces. If you have the lantern you can see them a couple seconds before they smack you in the face, but if you decided to run off on your own you have little to no warning before getting hit. This system promotes staying with your team and keeping track of a communal object which everyone would want to mind. If you try to take the lantern and freelance your attacking and movement abilities would be impaired. If you walk with your team with the lantern you have others there to keep enemies off of you while the whole party works together. This system would also mean less reliance on other sources of light, specifically the torches, meaning their light radius may be decreased since the lantern would be mobile.

Every RTS I know since I started playing warcraft 2 in 1996 has FoW. Congratulations on the necro!