Frey can walk in the air and won't fall down, you can press F1 as hotkey to toggle it

You won't get any damage if Frey gets a hit
I would recommend to combine it with the Gameplay-Balance Setting auto evade

As title says, your Q und E spells will always be ready

the game does override the values if you open the inventory/equip tabs, so if you want a value to be persistent you should tick the box to freeze it.
You can use the Purple/Red/Blue/Green Magic pointers to scale your damage

Allows you to spawn items directly into your inventory 
You can use the dropdown list with names or you can paste the ItemID from the pastebin list.