Here is my gear:

I think I will try to roll some prismatic amulets to try and top my resists off and hopefully get a good suffix (prismatic amulet of the whale would be awesome).
I'm not 100% sold on my Rhyme right now, because I don't need MF% (more interested in bases) and the blocking stats are useless for me. A 3 socket shield full of P diamonds would give me 32 extra @resist at the cost of losing CBF and +1 bone spear...hard to tell which is the better choice.
My gloves, boots, and rings are obviously crap and need to be replaced soon. If I find a nice chest to run I might go on a gambling spree.
This is what my merc is wearing:

His helmet is okay for now, but I will replace it with a 3 Sol high defense base when I can.
I'm honestly completely unimpressed by Treachery. As a bone necro, my merc spends a ton of time sitting behind bone prisons not getting hit by anything, so very often he goes into fights without Fade up. The IAS is kind of useless too because he has no crushing blow, and I don't rely on him for damage anyway. I would much rather have an armor that will keep him alive during those moments when he IS getting hit with a ton of burst damage. Something like a Gladiator's Bane or Iron Pelt would be awesome, but since I don't plan on doing any serious MF'ing, my best bet will probably be a nice e-bugged Stone with super high defense. I will probably try to find him a decent base for a 4 Sol armor in the meantime.
His weapon obviously sucks but the lvl 17 Meditation is amazing so I will wait patiently for a nice eth 4os Thresher/CA/GPA.