OK i give up - i see the build but it just looks like youre trying to shoehorn some abilities into a build that already did the job. Your build seems to want to try and do a little of everything,
Bone Armour is primarily an Inarius thing
Skelly mages are primarily a Rathmas thing (although i acknowledge theres a build in every set for them though most dont also use stand alone)
and until now Ive only thought of Nayrs as being a Legacy build type of power
The standard Inarius build already walks through T13 and can use Stuarts Greaves if you want to for speed. It will go through an 80 ok with only a basic level of concentration required. Now if this was the old days and some of the Necro loot had those old ridiculously low drop rates (like Starmetal Kukri, Wand of Woh or the old drop on Witching Hour) then i could understand the need to force the set to do another job, but drop rates on Necro are not a problem and if you want more than 80, Rathmas will tear through it without any of these range differences being an issue.
I just feel that if x build works perfectly but y build is slightly off then maybe y build isnt the intended design and y build is trying to hammer a square peg into a round hole. Still, it works, its an extra build and theres never such a thing as too many builds.