Effect of module
n = the module added S = stacking effect for this particular module addition
From this, we can know the following:
S(n) = 0.5^[((n-1) / 2.22292081) ^2
1 100% 2 87% 3 57% 4 28%

1/10 * (Faction) Burrow / Drone Collection (lowest)
2/10* (Faction) Hideaway / Drone Cluster
3/10 * (Faction) Refuge / Drone Gathering
4/10 * (Faction) Den / Drone Gathering
5/10* (Faction) Yard / Drone Surveillance
6/10* (Faction) Rally Point / Drone Menagerie
7/10* (Faction) Port / Drone Herd
8/10* (Faction) Hub / Drone Squad
9/10 * (Faction) Haven / Drone Patrol
10/10* (Faction) Sanctum / Drone Horde (hardest)

http://eve-survival.org/wikka.php?wakka=HomePage
http://evemaps.dotlan.net/
https://wiki.eveonline.com/wikiEN/images/b/be/Ore_grid.gif
http://ore.cerlestes.de/#site:ore
http://howtoeve.com/ref.html
http://eve.battleclinic.com/calculators.php#missile