item replace entity @n[distance=..3,limit=1,tag=necromancer_summon,tag=!necromancer_summon_unwieldy] armor.head with chainmail_helmet
item replace entity @n[distance=..3,limit=1,tag=necromancer_summon,tag=!necromancer_summon_unwieldy] armor.chest with chainmail_chestplate
item replace entity @n[distance=..3,limit=1,tag=necromancer_summon,tag=!necromancer_summon_unwieldy] armor.legs with chainmail_leggings
item replace entity @n[distance=..3,limit=1,tag=necromancer_summon,tag=!necromancer_summon_unwieldy] armor.feet with chainmail_boots