I assure you my sp/numbers are accurate. If you are getting less then 20k/hr on a sp party you are not at a good camp/or your setup sucks honestly.

while more people does lower your sp, it also speeds up your kill speed. It depends on where you are leveling honestly and what your ranks are.

The lower level you are at a camp the more you benefit for more people, the higher the level you are at the camp it is better for less. Remember the Goal is sp/hr not sp/kill. Getting 400 Sp a kill looks awesome but if you can kill the mob in half the time then 280-300sp/kill is better assuming there are enough mobs to kill endlessly.

Puks are an example in Nanawa... it looks bad getting 150-180sp a kill when you can solo for 200+ but when you kill a puk every 15-20secs the sp comes in at a lot faster rate.

The camps I listed above have more mobs then you can kill in most cases which is why I also listed them. Nanawa the puk bridges spawn incredibly fast with 8 people they will be spawning about as fast as you can kill. Copperbell no way you can kill all the mobs down there it can hold like 7 partys. Nine ives there are multiple eft/bird circles, crimsonbark there are multiple bird circles, Raptors there is a large loop you follow they should spawn as you get back to the start of the loop.

In the camps in grind when you clear the mobs in the circle you simply run for 30secs to the next circle with a whole new set of mobs.