I toyed with similar idea myself. My first thought was to have two forges in play to get full equip quickly. I had bats in book but switched to zombie.
[spellbook]
[spellbookheader]
[spellbookname]Nekróś[/spellbookname]
[mage]A Necromancer Spellbook[/mage]
[/spellbookheader]
[spells]
[spellclass]Attack[/spellclass]
[mwcard=DNA01]2 x Acid Ball[/mwcard]
[spellclass]Conjuration[/spellclass]
[mwcard=DNW02]3 x Wall of Bones[/mwcard]
[mwcard=MW1J11]1 x Idol of Pestilence[/mwcard]
[mwcard=MW1J04]2 x Battle Forge[/mwcard]
[mwcard=MWSTX1CKJ01]2 x Enchanter's Wardstone[/mwcard]
[mwcard=MW1J12]2 x Mana Crystal[/mwcard]
[mwcard=MW1J18]1 x Poison Gas Cloud[/mwcard]
[spellclass]Creature[/spellclass]
[mwcard=MW1C23]1 x Malacoda[/mwcard]
[mwcard=MW1C32]2 x Skeletal Sentry[/mwcard]
[mwcard=DNC07]1 x Mort[/mwcard]
[mwcard=DNC15]4 x Skeletal Minion[/mwcard]
[mwcard=DNC09]1 x Plague Zombie[/mwcard]
[spellclass]Enchantment[/spellclass]
[mwcard=MWBG1E02]1 x Plagued[/mwcard]
[mwcard=MW1E08]1 x Death Link[/mwcard]
[mwcard=DNE02]2 x Rise Again[/mwcard]
[mwcard=MW1E19]2 x Ghoul Rot[/mwcard]
[mwcard=MW1E14]2 x Enfeeble[/mwcard]
[mwcard=MW1E24]1 x Magebane[/mwcard]
[mwcard=MW1E27]1 x Marked for Death[/mwcard]
[mwcard=MW1E31]2 x Poisoned Blood[/mwcard]
[mwcard=MW1E40]1 x Vampirism[/mwcard]
[mwcard=MWSTX2FFE03]1 x Arcane Corruption[/mwcard]
[mwcard=MW1E23]1 x Jinx[/mwcard]
[mwcard=MW1E29]3 x Nullify[/mwcard]
[spellclass]Equipment[/spellclass]
[mwcard=DNQ05]1 x Libro Mortuos[/mwcard]
[mwcard=MW1Q05]1 x Demonhide Armor[/mwcard]
[mwcard=FWQ09]2 x Sectarus, Dark Rune Sword[/mwcard]
[mwcard=DNQ02]1 x Death Ring[/mwcard]
[mwcard=MW1Q07]1 x Elemental Cloak[/mwcard]
[mwcard=DNQ07]1 x Veteran's Belt[/mwcard]
[mwcard=MW1Q06]1 x Dragonscale Hauberk[/mwcard]
[spellclass]Incantation[/spellclass]
[mwcard=DNI08]2 x Dissolve[/mwcard]
[mwcard=DNI07]3 x Dispel[/mwcard]
[mwcard=MWSTX1CKI01]1 x Drain Soul[/mwcard]
[mwcard=MW1I08]1 x Drain Life[/mwcard]
[mwcard=DNI03]2 x Reassemble[/mwcard]
[mwcard=MW1I24]1 x Seeking Dispel[/mwcard]
[/spells]
[cost]Total cost: 120 pts[/cost]
[/spellbook]
If you're set on Sectarus, I feel you need Plagued. Won't work on the enemy mage directly, but a great thing to tag an enemy "buddy" with, as it won't affect you or your skeletons but it will affect your opponent's mage and creatures (outside a mirror match). Seems like a no-brainer when pairing the Necromancer and Sectarus.
Why it won't work on enemy mage?