i have run some tests today with a higher level necro to see what path i should take .
one or 2 skills maxed in early game need to be sacrificed for maxing the others later on due to the increased max skill levels gained from charms , and since the safety is very important in mid/late game , you cannot lose the benefits of Death ward and embalming , death pact is boosting both the spell damage and Veil king's HP so it must also stay , therefore Boneyard is the obvious choice to leave as 1-pointer while maxing the others .
you are now at the point where you must pick some other physical(/magic) spell oskill to use as main attack . OoA is very nice indeed , Magic Missiles also , Psicrown can also be decent , but there is also the melee option , by going for Exorcism (from crafted necro shield +
Shrill Sacrament
Shrill Sacrament
Chain Boots (Sacred)
Defense: (1625 - 1995) to (1762 - 2162)
Required Level: 100
Required Strength: 575
Item Level: 105
Exorcism: +50% Total Damage
10% Chance to cast level 20 Nightmare on Melee Attack
(10 to 40)% Movement Speed
+(10 to 30)% to Physical/Magic Spell Damage
+(9 to 13) to Exorcism
+(120 to 170)% Enhanced Defense
(15 to 25)% to Vitality
+(40 to 100) Life after each Demon Kill
Socketed (4)
) .
and i am still not sure if Dream eater will be nerfed or not ...
OoA is the cheapest and fastest option to jump at from early game , so yes , i might continue The Seer based on it .