You are stil lacking in dodge you should aim for 50 ~70% dodge (at lvl 100), 100%Glancing Blows and ~+1000 HP. (but increased dodge rating per equipped item with affix is impossible to find for me Q.Q)
Do note that Health is really effective for Reaper Form (as this basicly doubles your HP pool).
Get the Ornate Bone Idols that give ~40- 70% increased dmge while transformed will be fine for your damage.
As suffix these idols can roll Shared Necrotic Damage] (+45%), or transplant cooldown or +300 Necrotic and Poison resistance ones can be usefull aswell (total 600 necrotic and poison resist is… not bad (will probably be ~30% dmge reduction at lvl 100)
Head and Body Armor can roll
Increased Necrotic Damage While Transformed
of the Monstrosity (possible to find starting lvl 45, for a possible Body (110-150)% necrotic increase and Helm (73-100)% necrotic dmge increase.
PICK UP EVERYTHING with these crafting mods (even if it’s just to shatter them to get the shards).
Be prepared to farm (gamble) alot to get enough shards for these (or be really lucky while farming).
The rest of the shards are not that hard to come by.
from idols + chest and helm you can get a max 530% necrotic damage increase while transformed. Another possible 180% necrotic dmge (from idol suffix).
This is a possible 710% necrotic damage increase, which allows you to go full defence on the rest of your gear (besides crit chance).
Once you get decent idols you’ll be able to rush through monoliths upto lvl 30 without paying attention (i’m currently at Monolith 60+ with only having been close to dying once from a near 1-shot, but my char is lvl 100 and i’ve been extremely lucky a while ago with crafting - idols still need work)
PS (cheap damage increases):
At lvl 64+ you can find Profane Hood base (+60% spell damage)
At lvl 62+ Solarum Braces (+40% crit chance)
At lvl 31+ Coven Robes (+40% spell damage)
At lvl 24 Silver Amulet (+35% crit chance)
So your base white items can give 100% spell damage and 75% crit chance increase without any affixes, this can make up for not having the max 250% necrotic dmge increase from crafting, ofcourse these items with perfect craft rolls are the dream .