Here is the total guide for you guys.Version, long time ago people can play on version 1.143 or below, but after we patch it for version 1.151, it will only work on version 1.151 onward.
About the limit on soldiers on your party problem: This mod added the population on towns and village. This means higher level-tier troops will takes more spaces (slots) on your party.
Put the archers on front, stand in lines, infantry left or right or behind them. Cavalry next to them is a great formationWhen battle starts, to use formation press "U" key, press it again to disable formation. F2 then press F3 to form 3 formations. Then use F2 and F7 to make sure they will stand guard, then you can press V to order the ranged units to shoot the enemy within 5 seconds. Then you can lead the Cav to ride for glory! (Formation is deleted, native formation is good enough)
Also, in this mod pikes and spears are very effective against Cav, Cav charge at pikeman is = 100% death basically, also don't forget ranged units. That is why it is very important that Cavalry need to have shields.
There are alot of hideen equipment/ gears that is only available on chets, you should find them on towns
About melee combats it is very vital that you should use shields otherwise you will get shot to death.
People with muskets are really great at ranged combat, obviously better than bows in some case.
Because they reload slower than bows and crossbow, due to the fact that they have the highest damage input, they are the best on siege.
About creating new units:After you have made your kingdom, there will have a option where you cn create troops, you can also do this on your camp menu. Left key is to show the attributes of the troop, name, right key is return (NOT SAVE)
To save the unit, you need to click on the character at top, there you can assign the troop gears, items and stuff, Then you need to press SAVE.to get troops that you made, it will takes a few days until you can get them from towns.