Update docs with a list of standard coil stats, and further explanation of them. (#3749)

Author: DilithiumThoride

docs/content/Modpacks/Other-Topics/Custom-Coils.md

@@ -23,9 +23,33 @@ StartupEvents.registry('block', event => {
 })
 ```
 
-`temperature`, `level`, `energyDiscount`, and `tier` all must be integers.
+`temperature`, `level`, `energyDiscount`, and `tier` all must be integers
 * `temperature`: Used by Electric Blast Furnace recipes.
 * `level`: Used to determine Multi-Smelter Parallels, at 32*level.
 * `energyDiscount`: Used to determine Multi-Smelter power usage. EU/t = (4 * Parallels) / (8 * Discount), before overclocks.
+*Must be greater than 0.*
 * `tier`: Used for Speed Bonus in the Pyrolyze Oven, and Energy Discount in the Cracking Unit. +50% Speed, 
--10% Energy per tier. (Tiers above 10 will not cause the Cracker to consume negative energy.)
+-10% Energy per tier. *(Tiers above 10 will not cause the Cracker to consume negative energy.)*
+
+## Standard Coils
+
+For reference, the standard GregTech Modern coils use the following stats:
+```js
+Coil, Temperature, Level, Discount
+CUPRONICKEL, 1800, 1, 1
+KANTHAL, 2700, 2, 1
+NICHROME, 3600, 2, 2
+RTM_ALLOY, 4500, 4, 2
+HSS_G, 5400, 4, 4
+NAQUADAH, 7200, 8, 4
+TRINIUM, 9001, 8, 8
+TRITANIUM, 10800, 16, 8
+```
+This creates a pattern of each coil tier adding either 900 or 1800 temperature, and doubling either the Level or the 
+Energy Discount. This is significant because
+* For the Electric Blast Furnace, each coil tier unlocks new recipes, and adds either 
+  * A 5% EU/t discount *(multiplicative)* to lower recipes *(from +900 temp)*
+  * A Perfect Overclock to lower recipes *(from +1800 temp)*
+* For the Multi-Smelter, there are effectively two stats: work-per-time, and work-per-EU.
+  * For tiers that double the Level, the Multi-Smelter gains 2x the work-per-time, at the same work-per-EU
+  * For tiers that double the Energy Discount, the Multi-Smelter gains 2x the work-per-EU, at the same work-per-time