I'd be interested to hear what kind of system you used here, and what was hard to grok about it. Because I think the epic tier is perfect for mass combat and dynastic warfare -- with PCs being the patriarchs or matriarchs of entire dynasties, of course.
I made
this post a few months back asking for input. I changed a lot of the basic rules since that post, so here's the
quick-start rules I gave my players before the mass battle.
I think the reason why this system worked was because I had players used skills to train their troops and create squads of soldiers that had varying effectiveness at different roles. They ended up with 1 Paladin squad at level 10 that decimated almost all the enemy squads, followed around by a squad of medics, and 1 or 2 soldiers on the flanks. The rest of their troops were focused on defense, and manning siege engines.
A few players didn't like the Shadowrun feel to it, and would have preferred a d20 system, rather than a d6 system. The big issue was getting players to understand how initiative works, and taking their turns in a manageable amount of time. They also didn't seem to understand that they could move and control ALL squads, even if there were no heroes in that squad.
The whole combat took about 6 hours, and another 3 since in the middle of the mass combat there were 2 normal encounters that took place. I actually like the system, since it can be scaled to any size. In the future, though, I'd likely start off with a smaller scale. The players really like the skill challenges for training troops, building defenses, gathering supplies, scouting, and such.
I don't know if you've seen my
Marvelous Monsters guide, but I've put quite a bit of time into play testing different strategies to address this very issue.
I'm going to take a look at this as well; I saw it when you first posted it, but never downloaded the pdf.