I couldn't imagine an ankle gout flare without a cam boot. No thank you.
I find the compression helps reduce pain. I use something like this...
United Ortho Air Cam Walker Fracture Boot, Medium, Black (Pack of 1) https://www.amazon.com/dp/B006L8N0E8/ref=cm_sw_r_apan_glt_i_8TMWHKHQSEKNZRGTS6GR?_encoding=UTF8&psc=1
I primarily wear it to help walk around on a flared ankle / foot but if I'm really in pain it goes on regardless.
I also ensure I wear a hiking boot on the other foot to keep my gait as even as possible (otherwise expect hip pain).