I stuck at script that send microfaction scene (such as forts etc. ) to multiplayer. Field battle scenes, castle and town sieges, bandit hideouts and village attack/defense/farmer quests now working correctly. Non battle music during multiplayer battle was also fixed. At this moment multiplayer in this mod looks like classic Battle-time! cooperative submod.
In some cases (I still don't know a reason) it has a glitchy sashimono issues, so in current version sashimono was disabled in multiplayer. If I use pre-battle equipment script sashimono looks great but original code in multiplayer give unpredictable texture/material issues. It never happens with non heraldic materials. As a result I may try to solve this problem via constructing more primitive and obvious code of equipment without changing materials by script and using non heraldic materials on sashimono.