Re: Aiki Ken and Ken justu
No, aikiken would not serve you in a real swordfight. The reason for this is really that aikiken systems evolved during times when real swordfights don't happen so there are areas of instruction that are just not pertinent. You don't need to understand how long it will take someone to die if you cut them in various places, for example. You don't need to know how to get past armor or deal with your own armor.
Koryu sword training uses kata that have layers of instruction that are peeled away like the skin of an onion as the practitioner grows in understanding over the course of years of study. Aikiken takes some of these layers and disregards others.