Feel free to indroduce your own suggestions on this thread!
Necromancer Mastery: Add: Gain 1 % MORE Armour & Resistances for each Minion you have.
Necromancer passive: You take 1/2/3 % LESS damage on hit for each skeleton out. You do 10/20/30 LESS damage on hit for each skeleton out.
→ PLUS another passive point: You take 1/2/3/4/5 LESS damage over time for each skeleton mage out. You do 5/10/15/20/25 LESS damage over time for each skeleton mage out.
B) The vast majority of the passive bonuses are increased/reduced since they are additive (& therefore less powerful) compared to more/less which are multiplicative (& therefore more powerful because they always give an incremental bonus of the figures they state).