Don't look at LCS, number you see there is total damage including elemental damage from charms and poison affected by spell damage from gear and charms. That number doesn't matter.
With right gear, elemental totem and extended duration you can get 1mil damage there, which doesn't mean anything.
80k lcs isn't even high, I remember having 200k with some much worse gear, there was something extending duration and more spell power somewhere.
If you want to know real snake damage, look at d2stats poison dps figure.