No the site isn't mine I just found some of the information interesting (I was more interested in the various army/detachement lists and the new 'special abilities') I have really been searching the internet and various data bases for old info.
I downloaded your (Athistaur) groups rules and army lists. Enjoyed the lists, but unfortunately haven't yet found the patience to read through the rules with my poor grasp of German
When playing we do alternate detachments in the shooting phase but not the movement phase or assault phase.
We play with smaller forces, about 1000-1500 pt. total, consisting of only three to four detachments per side. The table we are playing on isn't very large and if the forces were much larger we would loose too much maneuverability. If our armies were larger I could see alternating movement to add further tactical complexity.
Pretty much we play by 'the book'. The 'feel' of the game is very tactical and we really like it.
The more I play the more I enjoy the game.
Another interesting Epic 3rd. ed. site I recently ran into (also not mine) is: http://www.rutins.com/fiverings/epic40k.html