Grey Pilgrim

I found the pillar order. I'm currently at Gazebo of chaos. I'm not sure that I get it right. But do I need 4 more people to activate the pillars?

Hi. I'm not sure if there is the right place to ask. But are there any way to return to Gateway island? I just left there by defeating the shade at the arena. I haven't explored all the place so I want to go back there. Thank you.