Warhammer Campaigns - How do you manage yours?

My group played the General's Compendium Boarder princes campaign several times. I even made a program to generate maps for each phase of the turn.

It is a good but not perfect campaign system. Some players got discouraged when some realms started to grow larger than others.  Also depending on starting positions and campaign progress, you might only ever have battles with one or two other players/races. ie. If you don't know how to defeat Vampire Counts, it might not be fun to have them as your immediate neighbors.

But over all I think it is a good system.  It isn't too complex.

Back in 5th edition we tried the original Mighty Empires campaign system twice.  It didn't work because attacking cities required siege battles.  And the rules for siege battles were not balanced.  A mega combat character (my favorite Chaos Lord with mark of Khorne) totally dominated combat on the fortress ramparts because of the lack of static combat resolution and no flanking etc.  I think the Blood in the Badlands siege rules are better.  But haven't gotten to try them out.

Ok, one vote for mighty empires and one against.
What's Generals Compendium? I've not heard of that one- is it an official supplement?
I'm also interested in what you all think are the best siege rules

I play with these rules based on Mighty Empire: Dark Tidings Campaign rules

For siege, you can use the 5th edition Siege book almost as is. The Dark Tidings rules provides some updates in there.

---------This is indeed a great campaign book. However, I absolutely love the 5E Siege book/rules...so I usually use those. However, I've played several siege games with the Blood and the Badlands and they do work well. 

-------Which edition?

-------The maps tiles are awesome, that's what I use for the map. When it comes to campaigns, I like extremely details rules with a lot of book keeping and such. So first edition mighty empires, and rules where you must keep track of stuff, make recovery rolls, etc. are what I like best.