snaps 30 (any higher is pointless) [related to server's sv_fps 20/30]
rate 25000 (no reason to go any higher than this)
com_maxfps 125 (if not 125 use 90 or 73)
cg_drawfps 1 (you don't need this unless you like staring at your fps all day)
cg_lagometer 1 (good for seeing when you lag or if you have irregular lag spikes but unnecessary to play)
cl_maxpackets 63 (you can use 100 if you want difference doesn't matter) [if you want a lower ping but higher delay use 15]
cg_fov 100 (this helps you out in many ways but not for lag/delay, so is unnecessary but recommended)
cl_hunkmegs 128 (use minimum of 128, if you have a lot of RAM use 512) [do not use seta com_hunkmegs, this command is bad because it will only leave your hunkmegs you want "latched". Instead go into your base, dcmod, etc. folders, open jk2mpconfig.cfg with notepad or whatever you prefer, go to edit > find and type in com_hunkmegs, change the value from 64 to 512.