Have you tried Strength Runes? They not only give you might, they also allow you to keep it up for long time periods. Axe is excellent for might generation, you may want to try it. Drop the staff, power builds don’t really benefit from it. It was only used before because there were no better options. Now there are.
SotL is not really useful if you run Wh. You don’t need a 100% uptime on the speed boosts. I’d rather go with Well of Corruption/“Suffer!”, depending on what you are facing.
Death Perception is less mandatory when you alrdy have +50% crit chance, I’d rather go with Foot in the Grave. You may also want to swap Signets of Suffering to Spiteful Spirit for more synergy with Blighter’s Boon.
Strength runes in my opinion redundant when reapers poop out might like no tomorrow, axe is still a terrible weapon (dagger is superior because of the cleave and better boon rip and lf generation). Staff should be universal to almost all necromancer/reaper builds, it provides unblock able fears, chills, and condi transfers when easily traited. This build is bruiser based hence the war horn and SoTL are needed, wh for lf and SoTL for aoe boon corrupt and a secondary heal.
Why would anyone take foot in the grave? The build already has two stun breaks and two sources of stability its a waste of potential damage. Signets of Suffering i more important for clutch situations corrupting stability or resistance. The trait you spoke of shouldn’t even be a grand master trait, its weak.