I don`t know if you know, but here goes nothing.
It started back in the days when I was usually not playing WoW more than 1-1:30h a week.
While I was catching up on the latest details of the server I play in, I just happened to notice a 3sec duel between Relentless gear user and a trash gear user.
I thought, "Wait a minute, that ain`t possible...". But here`s what I found out:
The DK was specced on Unholy/Frost (53/18) and Unusually was hitting for 3k+ with normal proc from Death and Decay skill.
I checked his gear- pretty much decent gear for TBC days...The most curious thing was: he was using pala Spell power gear.
In further investigation it turns out his SP and crit % make his weapon enchant proc around 80-90% and made him pretty much l337.
Weap ench- icebreaker
Armor Enchs- spellpower
He said he has 2700sp+

So that`s all.. I hope you like it.. it`s not exactly hack or cheating program but a simple game bug abuse.