Because Shangrila is a tight map, camping and working as a team will really make a difference to gain higher rounds.

The camping spot is the cave underneath the waterfalls where you can find the MP5. Open the entrance in front of the waterfalls and leave the other end closed, the other end of the cave that leads to the bridge. This closed door is also your 'emergency exit'.

Inside the cave, stay near the closed end and wait for zombies to line up entering the cave for obliteration. Napalm and Shrieker zombies can be dealt with as well because of concentrated fire. When the round ends, you can easily throw grenades up front to create crawlers.

This spot has a better shooting distance than the cart camping area and zombies will fall in line. This location is quite in the inner loop but access to other areas of the map is quick, the geyser near the flopper can jump you back to and from the spawn point.

You can easily pick up power ups too, or wait for the monkey and take your chances for a better power up. You only need to move forward.

And as usual, LMGs are the ideal weapons of choice for rate of fire and points. If someone rans out of ammo, you can always grab the MP5 and have an ammo refill close by.

A tip, since flopper is in this map, one player equip himself with Mustang and Sally and only to be used during times of trouble. With this weapon as backup, you might not need to open the escape hatch.

And don't forget the Spikemores.