What is the advantage of using .cs file instead of using .xml files? for routine combat.

Hello, .cs files are written in C# and allows the developer to take advantage of the full Wrobot API / Bot behavior.

This means C# written routines are superior towards routines created by the fightclass editor

because every action of the character can controlled by these C# routines.

 

In case if you would like to develop yourself these fightclasses:

Spoiler

To get started you may take a look into a few .cs files under the download section.

To understand the used function you will need a decompiler and search for the terms.

If you would like to develop this sort of fightclasses, i'd recommend Visual Studio.

I recommend to take small steps, see what's going on and take other fightclasses / plugins as reference. 

Searching for a few threads in the developers section should be also helpful in the most cases.