Not necassariy. If there were 3-4 rifles in a city instead of just one it could easily make an elephant rush impractical
Are you sure about that? I don't see it really becoming impractical due to a few extra defenders. It doesn't make a whole lot of sense to have 4 uber units... it's not like there are 4 Wizards of Oz.
At best, we're looking at normal-promoted units, such that they have City Garrison I as probably the scariest promo to deal with.
Only one of those units really makes sense to be City Garrison III, Drill IV, Guerilla III, Combat VI, etc (the Wizard). Again, I refer back to comments like the following:
I can't guarantee that the Wizard of Oz will not be eliminated by the AI. But how about this:
I will check all the teams saves periodically, and if an AI eliminates him without the team being aware, then I will let that team know.
Not only does he seem to talk about a single unit, not a "crack team of Wizards," but he also thinks that it is possible for the AIs to eliminate him. How can the AIs eliminate him if Paratroopers are required? I don't think that the AI is smart enough to pull off a manouver like that.
Honestly, we're not playing "the Ultimate Challenge that will screw up most players" game but a game where the average team is expected to be able to come up with some reasonably feasible way to take down the Wizard.
So, sure, we can go with the scenario where the Wizard is as powerful as possible and is also in a City with 3 other Riflemen, where the City gets the Hills bonus and the River bonus.
Then we just need to add on X War Elephant numbers to my previous numbers for whichever uber-unit is in the City.
Unless neilmeister manually-added those units, then they will likely be Longbowmen, not Riflemen, when we attack, but okay, let's say that they are Riflemen and that they were all, worst case, built with a Barracks, giving them the City Garrison I promo.
So, how many War Elephants will it take to kill an additional 3 Riflemen defenders with City Garrison I, on a Hills square, and with River defences, and 25% Fortification bonus? I'll go and run a few trials right now...
Note that I performed the trials using all 4 units in the City, not just 3 City Garrison I Riflemen all by themselves. The numbers reflect how many Flanking II War Elephants were required to kill all 4 defenders:
Uber Rifleman + 3 City Garrison I Riflemen 34, 36, 26
Uber Machine Gun + 3 City Garrison I Riflemen 38, 44, 36
Uber Mech Infantry + 3 City Garrison I Riflemen 84, 82, 95
Uber Modern Armour + 3 City Garrison I Riflemen 103, 82, 128
However, what you do need to remember is that we only need to kill the Wizard himself, not capture a City, and the uber defender comes up as the first defender until he is redlined, after which he will still come up before other defenders when the other defenders are wounded, so these numbers represent upper-bound limits. The biggest variance comes from the random number generator and as long as we plan for the worst that the random number generator can throw at us, we'll be good to go.