A huge amount of time is wasted in the beginning of many scenarios as they were not designed for relatively rapid play. On the other hand, most people that are interested and able to play multiplayer want to do so to fight and contend with human players through diplomacy, joking around, and military strength. I seriously doubt multiplayers want to send 15 turns developing infrastructure and trade networks and the like. So the solution is to create a more built up stable economy and therefore a robust military can be put in play right away. That is far different from the standard scenario as the AI is merciless and would annhilate the human player and other tribes by hurling everything all at once since those military assets are available and the economy will support it. This is rather why nuclear ICBMs and the AI does not work because a human would hesitate but an AI doesn't give a care. Most scenarios are designed to play with up to eight tribes with the barbarians being one of them, thus the build up is horribly slow. Part of what I am currently working on is establishing such a resource rich environment for a Sengoku Jidai scenario. I'm talking about huge numbers of diverse units and numbers of samurai leading up to Sekigahara...that's 200,000 samurai being depicted in a scaled manner that proportionate. That is very different than having basic asigaru spearmen in turn one. At the onset, I would think each side would have at least have a hundred units of various abilities such than war is tempting but problematic to deploy without another player subsequently attacking the initiator's now defenseless cities. This creates genuine tension and escalation and probes and manuevering hubs of soldiers so they can readily and dynamically alter the plans.