Well I tried again with Oromos and I just not that impressed compared to musketeers. If its a choice between Napoleon and Zara then I'm going with Napoleon. Individually Oromos are very good - the problem is that they aren't strong enough on their own to carry a war at a time when it is very difficult to war against the AI. Wait until cannons then they will do very well - but if you have a big army of cannons then ANYTHING will do well. All these comparisons with an army of cannons miss the main point. With musketeers I will not go to Steel, I will go to military tradition and partner my musketeers with Curaissers. I will get an army of musketeers and curaissers deployed much more quickly than an army of cannon and Oromos. Its a quicker tech path and my army will be concentrated much more quickly - on Epic I can expect to be ready to attack probably 25-30 turns earlier than going through Steel. That means I will be facing less ready opponents with lower tech themselves. And my horde will not give them any time to build more units.