I have gained the golem, but the game will not allow me to assign it to slot 4. I have removed the ultimate skill that was there, and the game will not allow me to restore them. I have followed the instructions on every website that tells how to do it, but the game will still not allow me to assign the Golem skill to my skill bar. Can someone explain to me, step-by-step, how this is done? Thank you.
On PC you press S, than drag and drop. You have to wait for the slots border to get highlighted in gold.