quick advice on my sorc stats

ok cool, i have some decent life now, i can survive a whole lot better, i wish i read that before i put all those points in life though, i guess i should have put it in dex then?
oh well.
here's the deal, im 81 now, i maxed blizzard, cold bolt, the one after it, and i have glacial at like 16 or 17
my blizzard damage is only like 2541-2737 isnt that kind of shitty? i have a bastard of a time just trying to kill nm meph.... i remember back in the day taking that thing out in like 10 seconds. i put 1 point in cold mastery too
now is that damage normal? i mean i picked blizzard cause its what everyone seems to have so i figured i would start out easy, what the hell is with that damage when i hear everyone else talking about their characters doing like 15k and up with whatever cool stuff they have?
please tell me it gets better...

do the moat trick man you should have no problem killing him even with 1k dmg bliz...

... i used to use mephbot back in the day , i dont remember a moat trick... then again i was never the one actually killing him... you get him caught on something or something like that?... or something...?

All you do is tele to him, lure him down towards the moat inbetween the two landings (where he is and where you come down) stand far enough back so that you can see him just a little bit and fire away.