The best source of information for shaman stuff at this time was the Shaman's Crucible. The earliest that the wayback machine will go is March 6th, 2001.
http://web.archive.org/web/200103060...s/level_60.htm
Torpor
Mana: 200
Duration: ~24s
Torpor will regenerate 1200 HP over 4 ticks, however while in effect it will snare you, and reduce your attack speed (note: Some Shaman have reported Torpor doing 1540 over 5 ticks).
Also worth mentioning that this same listing reports that Avatar is supposed to overwrite the Strength line, but I don't think this happens on P99. Worth looking into further.