to lvl your wep and nano tech really fast you need to...
>go on any difficulty lvl
>go buy a bunch of xp mods *like 10 for every wepon*
>put 10 of the xp mods on each of your weps
>set all of your wepons on the shock mod
>go to endzone
>use the wepon you want to lvl
>if you are just leveling your nano tech i suggest you use your dual raptors, and run along the very back *so you get ammo that falls into the lava pit* and shoot once to wipe out each wave *be sure to take out the bigger opponents first*