Alright, here's my rough draft for the relative strengths and weaknesses of the fiefs:
House Lindon (mesor): Very defensible, but fairly low population and little farmland
House Schliesen (Zrk2): Farmland, but not a lot of metal
House Haigwaa (Kedly): Defensible and isolated, but not a lot of space, very low population, and isolated
House Bachwel (USEC_OFFICER): Defensible and with plenty of iron, but minimal food
House Lorinar (Deny): Access to metals and some food, but somewhat indefensible and a higher risk of rebellion
House Bloodraven (Tellemurius): More magic and some decent agriculture, but very low population
House Dalberg (Thorik): Woods and pastures, but not many crops. (The Norse were pretty pastoralist, which is one of the reasons the Norse Greenland colony died.)
House Chedel (Vonyx): Agricultural and a trade hub, but no natural defenses and minimal metal
House Shadowkeeper (Child of Armok): Defensible position and isolation, but only one city and needs to import food.
Almighty Guild of Knights (ansontan2000): Leads knights, but requires the support of others due to minimal serfs.
The Circle of Psyche (IamanElfCollaborator): Scholarly, rich, and good with magic, but very small population, few warriors, and no official titles
Population numbers:
Lindon: 15,000
Shliesen: 25,000
Haigwaa: 5,000
Bachwel: 20,000
Lorinar: 17,000
Bloodraven: 7,000
Dalberg: 20,000
Chedel: 25,000
Shadowkeeper: 1,500
The Circle of Psyche: 3,000
The Guild: Let's say...500 actual knights and 3,000 squires, footsoldiers, etc.
Let me know if these are unacceptable to you, whether due to your faction's weakness, another's strength, or something else.
Remember a few things:
The goal is NOT to conquer the kingdom, and without some real skulduggery you're doomed to failure.
Assuming good farmland or fishing grounds, one farmer or fisherman can feed four people. Pastoralists can, for simplicity, feed 2.5 people each as well as provide other goods. Food can be exported...indeed, most of you sure hope it will be...
Population includes children, who may be anywhere from a quarter to a half of your population, roughly. Lower means fewer weak hands and hungry mouths, but higher means you will recover from wars and other population-losing events faster.
Wood is a vital resource, from heating homes to building them.
Alliances and such are not only okay, but encouraged! Hooray, intrigue!
Work out how many of your people are doing what. Bear in mind that you can only have so many people working in the fields or fisheries and still be operating at maximum efficiency. I'll OK or veto your lists, primarily OK but possibly with notes. Also work out how much food you can export or will need to import.
That's all I can think of right now, have fun! I'll draw up the map choices once everyone's fine with how I interpreted the bare bones of their fiefs.