a phantom powering box
You don't need that. The 1622-FX has a built-in Phantom power. You should ONLY use this if you have a condenser microphone that actually needs it. Dynamic mics are typically a lot cheaper and sturdier and don't need Phantom power.
and one XLR cable
What do you want to use it for ?
even though it is a powered mixer.
It's not. ...