Ah typical Stormcloaks, only seeing Cyrodil as the Empire whole.
When the legions march with Orc, Imperial, Breton, Nord, Dunmer, Altmer and Redguard standing side by side, you will then see the folly of your blindness.
Nords proved they don't need magic? The legion proved its the greatest fighting force on Tamriel.
I wouldnt count on the redguards for help in the second war if u side with the empire. More or less theyll watch from the sidelines and atk when the enemys retreating or when its weakened from beating the empire..or if they atk hammerfell first. I see them not wanting to get intangled with the empire so soon since u know the whole empire deserting them thing.
The dunmer, eh their homeland is a mess so I wouldnt count on any great houses or great wizards in force, more like the dunmers alrdy living somewhere else in imperial lands, but not the actual great dunmers of morrowind.
The argonians and the khajits..pretty much self explained. Wouldnt see to much help from them sinve u know they with the enemy now.
ill give ya the orcs since they pretty much are good atm and havent got shafted yet.
As far as nords being superior, they are against imperials as far as melee. Plus the imperials are civilized compared to the nords wereas the nords strike fear into their opponents thru showing their battlelust and whatnot.
Plus this civil war I wouldnt even go as far as saying whoever wins is the better race since the empire is so short on soldiers they are using primarely local nords to do the battle. So we can say the civil war is only weakening skyrim, BC it's only skyrim locals who are fighting. The empire isnt using or wasting their bretons or imperials, they using the local nords.
Also never umderestimate the underdog. Yes the nords wull when they went and beat the elves, but thats only one weapon. The leadee didnt do it alone, they did it being pissed off nords looking for a fight. Tiber needed a giant robot and aassive army, whereas the 500 only needed a kickass mace and nord battle lust and a pissed off attitude.