I agree with the general sentiment expressed here that you don't want to push tactical mastery too high as you'll be compromising your crit and survivability to do so.
For my top tier raid build I have,
4 Hytbold + 2 Greater Erebor, focussing and crit defence/crit rating.
Earrings - 2 from BfE
Necklace - Gold with crit defence
Rings - Rohan Healers gold + Sch/Lib gold drop
Bracelets - 2 from Wildmore
Pocket - Drop from OD- disease (big dose of crit defense)
Shield - Wildmore/Mirkwood gold
As you can see I put a big priority on getting a decent crit defense, in most stuff you won't need it quite so high. I just can't be bothered maintaining separate loadouts for easier content.
“All we have to decide is what to do with the time that is given us.”