Best Necro nodes for golem build?

I'm looking at all of them and can't really decide which one to pick..

Mistress of Sacrifice

20% increased Skill Effect Duration
Your Offering Skills also affect you

Flesh Binder

You and your Minions have 1% additional Physical Damage Reduction for each Zombie you own


Beacon of Corruption

20% increased Chaos Damage
+15% to Chaos Resistance
Minions have +15% to Chaos Resistance
Your Minions spread Caustic Cloud on Death, dealing 10% of their maximum Life as Chaos Damage per second

I am gonna run with 7 zombies in addition. Gotta pick 2 of these 3. I don't think I need offering skill on myself but 30% increased duration isn't bad. On the other hand that 7% dmg reduction with 7 zombies doesn't really do anything special. Is beacon even useful if I dont use chaos damage?