Infernal legion area of effect

my goal was to make a huge minion aoe effect.

not sure how? if minion aoe makes a difference to the minion aura because i have 2 heart bound loops which add 20% minion aoe and im not seeing a notable difference.

necromantic shields + Zeel's Amplifier 1% increased Area of Effect per Enemy killed recently, up to 50% ?

any help would be amazing.

bump does anybody know anything about how to increase the area of effect radius of infernal legion support gem?