Please stop spewing bad advice on NIC. It is not as amazing as it is for Affliction Warlocks, but it does beat a large number of trinkets all the way up to the 251/258 level trinkets. It beats Abyssal Rune on any very short, or decently long fight as long as you can roll it for at least 75% of the fight. It might be bad on something like Blood Princes, or Dreamwalker, or Gunship... but to claim it's a bad trinket just proves you don't understand it and aren't using it properly.
No, it doesn't beat Rune on any fight unless you're at a point where you don't need haste at all (Then you should already have a better trinket) Although you are right that it does beat Rune on any short fight (2-30 sec I presume)
20% crit on one cast of VT/DP and a full rolling SW:P won't do nearly as much as you think, as Shadow doesn't benefit much from DoT crits.
NiC is an average trinket when used expertly and a sub-par one when not managed well, avoid.
Don't avoid it, if you do not have access to clearing Ulduar/ToC weekly and suck with drops, it is a good trinket to get. It is better than the Sundial and the trinkets the OP listed though.
Originally Posted by eErike
Dono why, but I got a strong feeling that this was ment ot the OP :/
And as I've said before, abyss is better than NiC
Yes, on average, it is 5 PP better, which is a very small dps gain. The difference is close to negligible or not even noticeable, in a fight, with NiC doing at least equal, if not better, with more movement/AR proc is not used to its fullest because it proc'd at the worst of time.