Ok first of all i would to say you must be at least decent at this map and zombies to be able to do this strategy and yes it does require alot of concerntration
Solo Strategy:
For co-op strategy look down
Ok so as you spawn you just want to be shooting the zombies 6 or 7 times in the leg then knifing them so that will rack you up a nice amount of points round 2 if youve got ammo left just knife the bi*ches twice by the end of this round you should have enough points to open your first door you want to ope the boat door being the one on the right side of revive soda once your through here you should buy the MPL off the wall now go back and camp right in front of revive soda and just pick the zombies off one by one and if you didnt have enough for the MPL then simply knife a bit more until you get there ok now by round 6 you should have enough to do a fair amount of doors/debris hopefully enough to get down to juggernog and buy it because juggernog is without a doubt your main target and if you didnt have enough points for jug then simply camp around the PM63 area until you have enough.
Ok now we have jug the strategy can begin to take effect and you want to save enough to clear the debris which leads toward the AK74U area and if your out of ammo just be patient and slowly knife the bi*ches until you have 1000 points to buy the MP40 off the wall then your next target will be to clear that debris we mentioned earlier ok now we are in the AK74U area as i like to call it the best thing to do here is to simply run circles or **** trains around this area until you have around 5000 points with these 5000 points you will open the door next to AK74u then get Revive when you can, go up the stairs clear debris then clear the next debris and you will be at the top of the light house before you start the next round you want to buy either PHD Flopper or the myster crate its entirly up to you personally i would buy PHD Flopper ok once youve made your choice go back to the AK74U area and save enough to open the door to the back of the 2nd boat (where the semtex are) once this is open go back to the top of the light and camp right where the zipline is and simply shoot the zombies that come up the stairs and out of the barriers and if you find yourself becoming overcrowded then DO NOT ride the zipline but just drop to the floor where AK74u is then run back up the stairs and camp again and from here your golden baby!
However if you do not like where you are camping then by all means just run around the AK74u area again but the perks i reccommend for this light house strategy in order of importance are Juggernog - Revive - PHD Flopper - Speed Cola Guns i reccommend rounds 10-16 HK21 Or RPK rounds 16 onwards Ray gun with Upgraded VR-11 so that you can get rid of george romero everytime.
Co-op Strategy:
Pretty much the same as solo except you share the doors that you buy and try to equally share points and its also good if you get jug around the same time as each other and when it comes to the team doing their seperate things one should run **** trains around AK74u area 2 should do the lighthouse strategy i said above and the other one could run around spawn area which i think could become a dominating strategy which i may also write up about.
Thanks for reading, youve finally reached the End! Hope this helps!