Nemesis is a 106.89 dps gain over the tier8, ignoring the set bonuses. Now, assuming that you either:
Mistyped it here, equipping the nemesis skullcap is making you loose 4pt8 and not 2pt8
Mistyped the set bonuses in the mod's input frame, writing 100 in the 2pt8 instead of 130
You get that Nemesis Skullcap is worth exacly 6.89 dps more than Deathbringer Hood, just the number that you mentioned (6 something dps) in your post. Mind that Nemesis is worth 6 more dps than Deathbringer + lost set bonus, so RhadaTip equipped the correct item.
hi again, 1st off i would like to apologise on the scaling as i didnt explain it clearly at all so thats my fault there, its only the set bonuses that are the same (taken from your video) rest of stats are set as follows:
the same is also true with my wand, upon completeing the process the optimizer equips [Gemmed Wand of the Nerubians] i then go into my bags and hover over [Rod of Imprisoned Souls] and it shows this wand as being a 51.53dps gain. (not sure if this has something to do with self dps similar to the rings)
after the optimizer is done my total gear dps sits at 7231.30 (and 12.85% hit) when i swap in the 2 peices mentioned my total gear dps sits at 7289.48 (12.16%hit) your probably wondering why im specced 3/15/53 if i have that much hit, basically it was up until my last raid i was around 10% i was fortunate to replace [Pyrelight Circle] with [Firestorm Ring] and [Chain of the Ancient Wyrm] with [Darkbane Pendant] on my last TOC run.
i do have the 2.1.4 version of the addon
im guessing im probably doing something wrong myself in all honesty but i cant pin point what it is.