so how to use pikes in RR/RC?

[napoleonic]

I used AP for attack point not armor piercing, sorry for confusion

[Caesar Clivus]

AFAIK the guide does not tell me about superior units having + 2 AP or such.

Yes it does. There is a whole table there explaining all the bonuses/penalties that each unit quality gets.

[napoleonic]

really? I overlooked it then...

[Seether]

No worries, it happens. There is a lot of information in the guide.

[Pietrak]

Historically, wagons were sometimes used this way, especially in camps and when defending supply trains.

Hussite Wars! Check on wiki

[Maltacus]

Also used in India and Korea, as well as nomadic peoples bringing wagons with them as they migrated.

[Point Blank]

That guide is pretty old, there have been many tweaks since then, but the basics apply.

[lampros69]

Also used in India and Korea, as well as nomadic peoples bringing wagons with them as they migrated.

Yes, Koreans used them to great effect v. the Khitan heavy cavalry during their many wars in the 10th and 11th century. Koreans also used them versus samurai cavalry during the Imjin War that began in 1592.