Necrotic week is fantastic as a paladin tank. Gonna have to test the Holy shield thing but it sounds logical that it acts that way.
First thing to note, i do overgear it a bit when its not 10 or above, so that does have an impact.
http://eu.battle.net/wow/en/characte...Bbileus/simple
Anyways, if you are struggling with it and have sephuz and or Uther's guard in your bags, consider em your best friends during necrotic.
Sephuz helps with kiting
Uther's allows you to Blessing of spellwarding for 15 seconds meaning it will reset your stacks 100% of the time.
Thoose items aside, someone mentioned our lvl 100 talents. Righteous protector is garbage in necrotic week as our heal is most likely not gonna be that fancy. Last defender or Seraphim is your go to here, i personally stick to seraphim as it is a dmg increase that is just too high to ignore.
In the lvl 60 talent row i take Blessing of spellwarding as it prevents stacks of necrotic being applied (note: it does NOT remove em, just no further applications)(Further note: if you do NOT have uther's guard you have to make some distance to the mob when the blessing runs out or you risk it applying it before it runs out entirely as necrotic and spellwarding are 10 sec buffs/debuffs)
in the lvl 90 one i always run consecrated ground as a 50% slow is just that much stronger than the alternatives in mythic+ in general.
in the lvl 75 one, Final stand allows you to still do monstrous pulls in an enraging necrotic week, say the Maw of souls pull where you do everything before 1st boss at once, with final stand you just use your ardent defender/guardian initially and when they are gathered and the dps is smacking em you final stand and watch em die while they do 0 dmg to you despite being enraged.
Rather excited about trying the holy shield thing as i did not realise it might do so, gonna take some time getting used to not running with blessed hammer though
All in all, embrace the necrotic week, it is the week you are a god in, where you can carry most groups to +3 or +2 as everything is something that you handle, and not the dps. And with all the tools protection paladins have avaiable for it, we are most likely the best necrotic tanks.