After all of these years, I’ve still not come up with an acceptable plan.
The first problem is that a Crusade victory almost never pays off if you try to keep the city, especially if it is a target in the Levant. The cost of troop upkeep alone far outweighs any financial benefit. Yet gifting the city away to the Crusader States or the Pope seems rather gamey. And merely evacuating and leaving it undefended to return to the Islamic factions also seems quite odd.
I’ve always played SS6.4 with BGRIV or V, where at least there was a very, very good reason to at least send your King on a Crusade. If you didn’t, all of your generals would pay a heavy Crusade support fee that would quickly bankrupt the poorer ones, requiring them to be exiled from the land usually for the rest of their lives. In SHHIP, it appears to me that the very small hit you take in your favor with the Pope is not nearly enough reason to join a Crusade in the first place. The main reason I have been joining is because I think it also reflects in your reputation, though I imagine that may also be fairly insignificant. Nevertheless, I am joining, and usually ending up the victorious liberator. Yet even on capture of the Crusade target, I don’t notice my favor with the Pope actually going up much, if at all, in fact.
Thus, I am stymied on several fronts. I do join the Crusade, it does cost me lots of distraction and money, and I do usually end up winning, whereupon the cost of the whole endeavor continues indefinitely with no noticeable benefit to me whatsoever. Inevitably, I eventually continuously ask myself, what is it all for, merely the glory of God? And then I again tell myself that I should just forego the whole ordeal in 25 odd turns or so when the next one is yet again called by the fickle, aging, warmongering Pope.
Any ideas?