Doc Tsiolkovski said:
I just think those waste of 10sp early is worse*. And MI are great units - somehow I rarely see MAs, but MIs pretty often.
Same as I do send a few Spears along with the Swords when invading - if you get attacked, better loose a 20sp unit than a 30sp one.
Also, I for one do not really like to leave the presumable safe hinterland open - there are always Conquistadors. And sometimes the AI uses Berserks to capture (defended) coastal cities, and then reinforces with a shipload of Knights. This happens a lot more often in Mods - I'd in general stay away from undefended cities in RAR.
Of course, you could station Knights everywhere - but that isn't effective in terms of shields.
In the end, it's a question of playing style. If you prefer to play on levels you can easily handle, and go for high scores - no need for defenders.
*Edit: Actually, if you have a city making exactly 10sp it isn't that bad. The problem is, at that time many cities make like 7 or 8spt; thus, you waste 4-6sp for any Warrior you build.
Doc, I think that you are correct about the playing at what ever level is easy for you, you can do what ever you like then.
It is at levels that you have some challenge that you need to take more care. That level is also a function of the start, as some Deity games are quite easy with the right start.
I cannot speak to mods, I don't use them, but I cannot imagine having Kinghts stationed everwhere, that seems to be a big waste.
I would say that some 10 shield warriors are easier to come up with than 20 shield spears, not to mention I may not even have the tech for spears.
Once I have horses, then I will make them, even though they are less effective on defense and offense than Swords. They are mobile and will allow me to get by with fewer units.
Often at the very earliest stage, it will be 7 turns to make a spear and 4 for a warrior (with waste). The difference means I get that MP value much sooner.
If I have to attack barbs, I would rather use warriors and have them die than spears. Often I will be much better off spending the extra money to upgrade that vet warrior to a sword as I am coming under pressure.
I still do not have any better defender in the AA than the sword and it is three times the attacker than a spear. I am not so concerned about the shields at this point as I am about lossing the battle.
So you may be correct if it is all about the cost in shields, but to me it is more about damage control and expansion. These task are not well suited for spears. Hopefully I have enough horses to use them and I do not have to upgrade any warriors.
Yes I will certainly use cheap units, if they are at hand as fodder to absorb counter bombarment from say archers. Or to maybe take off a hit point to soften up a tougher unit. I do not build units for that purpose, but if I have them....