blitzkrieg1980
Octobrist
I like to play Marathon so i have enough time to use all this units.
the most useless i think are archer and longbowman
You're not being serious, are you? Not much city defense is offered in the Medieval era from units other than Longbow. With an inherent +25% city defense +20% (from CGI) and possibly a +50% hill bonus, with the +25% fortify bonus, a level 2 longbow has a strength of 13.2.
Since much of the time, theocracy is in play, you're getting another +25% for CGII so now you're looking at +145% = 14.7.
Crossbowmen aren't going to give you that. I guess you could use maceman for city defense with a shock promotion, but really that's a huge waste of hammers that are much better used on city raider promoted macemen. On Marathon games, Longbows cost 150 hammers and Macemen are 210.
I guess if you have a massive enough invasion force, you won't need any city defense. But if you're playing any sort of game with more than 4 rivals, you're still going to need some sort of city defense and archers/longbowmen are the most economical and provide really good defense for their cost.
Besides, if you're playing marathon, you'll need thos efor a while.