Before you answer this question, please read on. We are to consider:
1. The profits, both in terms of money as well as other loot, and specially unique items that can be gained from that stronghold and its quest.
2. And then again, its only that part of the profit which can be gained by a protagonist having a class specific to the stronghold. What I mean by this is that we are not to consider any items which are gained by a protagonist of a different class by playing any quests related to the same stronghold area. As an example, the Carsomyr, though related to the Paladin stronghold quests, can be gained by any protagonist killing Firkraag, so it is not considered as part of the profit. However, things like the Staff of Power or the Moon Dog Figurine are exclusive items gained by the protagonist only if they belong to the respective class, and so they are considered.
3. Experience gains. Again, only that part which is exclusively gained by the protagonist having the specific class.
4. Anything else worth considering.