I've never played Skyrim for months

but I plan to goback again as a stealth assassin

but the last time game gets too easy late game even on master
the trouble is ....

1. my Nighingale armor reaches armor cap easily with perks and smithing potion
there's no need to stealth anymore
even if I was detected I can just stand still and keep pressing attack enemies with my dagger
stealth is no more exciting

2. stealth is broken
with 100 and perks (not even with enchanted ring, amulet)
enemy can hardly detect you at all even if you couch just right in front of them

I've tried Skyrim Redone but it changes the game too much
that I cannot get used to it even after 2 hours of playing

and stealth becomes useless at the start

please suggest new mods for my assassin

and
3. the bow sneak is really really weak


I've tried SPERG mod too but i feel that it was somehow not balanced for magic