A friend of mine has swarm crusades. He forms a crusade army mostly generals, sometimes as many as 8. Join the crusade, hire mercs to bulk out, hire or get on ships, and sail to the holy land. Drop off one general on land, say about where Cyrene was in RTW. Hire mercs with him to form a new crusade army heading for Egypt. Drop off another general by Adana, another by Antioch, another by Gaza, another by Acre, hire mercs with all of them. Send the rest to Jerusalem. Take all of it with crusade armies. Do the actual crusade target last.