I personally play Der Reise 90% of the time, and with the above being said, 90% of the time it is with 4 players, at around Round 25-30 we start using the teleport strategy and loop the entire map together, but until then it's a free-for-all of people looping (kiting) in there own area.
It is separated like this:
The Thompson Room Loop
STG-44 Room Loop/Power Loop
Spawn Loop
Double Tap/Next to Double Tap Loop
The best (according to the majority) is the STG-44 Loop (due to the fact that you not only have a huge area but an easily accessed wall weapon) followed by the Thompson (cramped, but very easy wall weapon), the Spawn (huge, but no wall weapon), & last the Double Tap loop (cramped, no wall weapon). We usually come to an agreement such as whoever loops at a certain area can get so & so weapon. I personally think Zombies IS meant to be a team game & that agreements like the such need to be made. The person that ends up getting the most will usually pay for the teleporters/traps so the points usually end up evening out almost.
I personally don't really think it matters that much, the ends justifies the means, as long as you get far who cares.
Hopefully future maps have the Hacker and points are able to be transfered in bigger amounts then 500 (chump change past round 10).