Are the Mass Combat rules in Lead by Example completely different from those in Onslaught on Arda I? I ask because I do not think I will run mass combat but maybe once a campaign but thought that it would be a better solution for capital ship combat.

Looking over the talent tree's I think the Mass Combat related talents would work with OoAI's mass combat rules.

It's a little more in-depth, but the core of it is largely the same. Some expanded information on what might make one side be equivalent to X number of Ability/Difficulty dice, what to use Advantage and such on, some ways Boosts and Setbacks can be added, and when to trigger another Mass Combat roll.

Thanks