[The_Tauren13]

Does it matter what the neighboring provinces are resource wise? If the province with the castle gets 100% of its resources and drains 40% of all nearby provinces resources, does it matter if those provinces suck-so put the castle in the best province of an area to take advantage of it? Does it simply give that province its full potential or give it the resources drained from nearby provinces?

OK... lets say you build a fort in a province that had previously shown 50 resources. The province really had 100 resources, but without a fort you can only utilize half of it. So.. the fort you built will make the resource count 100. Now, the administration value is a percentage of the resources in neighboring provinces given to the fort. So, if you have the fort built next to a province with ( too make the math easy ) also 100 resources, and your fort has an admin value of 30, 30 resources will go to the fort, making the total resource value 130. The 30 rescources will be drained from the second province, making its resource count 70. Without a fort, however, only half the resources will be used, giving it only 35 resources. hope thaqt helps the confusion

Besides a few spells and my immortal god ressurecting in it, how exactly DOES domain help?

perhaps the most important dominion bonus is morale; troops fighting in friendly dominion gain 1 morale, whereas troops in enemy dominions have -1. this makes the morale difference effectively 2 points.