Please help on choosing the right wand for my witch

Hi,

I wish to buy a wand but i'm not sure if is it better to have a wand with
"Minions deal 100% increased Damage" or a wand with "+1 to Level of all Minion Skill Gems" and "Minions deal 50% increased Damage"

So basically is it better a 100% damage boost to minions or a 50% damage boost and +1 to level of all minion skill gems?

Thank you very much

there are 2 ways to verify
1. use the wands you have and see how the game goes
2. create the item in PoB, and check the exact value of the increment