So I am leveling a new DK and have leveled him to 70 using no add ons other than quest helper mods. I am more of a person of functionality than anything. Are there certain mods tailored to DK's to make leveling, raiding, etc. easier? If so which ones?
the only thing you need really as a dk as far as mods go is something to track your diseases efficently, i recommend sfilter, poweraura's for killing machine and rime if your frost and something to efficently monitor runes, i'm using ouF_alza(unitframes) for that.
Very few mods are class specific, or suited to a class.
Some indication of the runes is what I would say is one of the few exceptions to that rule.
Diseases can be tracked by pretty much anything capable of tracking dot's etc.