Cradily is meant to outcreep 0 Speed Hariyama. Scarf Primeape/Scarf Jynx hit 475 Speed. At +4, you need 228 Speed EV's to creep them. If you want to save some more EV's for Special Attack, 28 EV's outspeeds Timid/Jolly Swellow. Since it can't do much to you though, 12 EV's outspeeds Sceptile. You can also run max Special Attack over max Special Defense, but the Special Defense helps deal with Magmortar.
I have no idea why Camerupt runs that Speed, since it Speed ties with Quilladin, and Golurk is only 146, whereas this set hits 150. Fastest things you want to outspeed are Scarf Tauros, and Timid/Jolly Swellow, so to outspeed those at +4 would be 176 and 128 respectively. 240 Speed EV's is needed for Scarf Tauros, whereas 48 Speed EV's is needed for Swellow.