Releasing cores seems to work alright. The couple times I've done it, the country I gave back to went and lost them almost immediately. I've just changed my tactics to only take high tax areas. Egypt especially has expanded into a lot of poor areas, and they can keep them!
So, my question today is how do you guys deal with the AI stack that doesn't want to get caught? Every time I fight Egypt, Lithuania sends help, so I'm already fighting a 2-front war. However the help from Lithuania just leads my armies on a merry chase. My stack would defeat it easily, but my stack isn't big enough to split into 2 to help hem them in. Do I really got to do a 2-fer-1 for every stack that doesn't decide to fight? Will make the sieging slow going.
Also, what size stacks and composition do people tend to field? I'm trying 10-5-5(infantry-cavalry-artillery), not sure I like it. Wondering if I should go 5-5-10.