This Act starts out with probably the gayest battle because I HATE the Satyrs. You start out with Cerebus and as you remove heads Satyrs come in. Try to keep the Satyrs on the defensive and pound them one at a time with everything you have. When in doubt, DODGE. You've been in this area many times so you should know your way around. Save the game and there is a hidden item to the right of the small pool. Then head back and activate the circle. Now head through the far right portal grabbing the chests as you go. Head left from the portal and bash the Onyx. One judge down. Sirens and dogs as you leave the area. Hidden chest to the right of the overlook, then a double jump glide to the next judge's head. Bash some shields after that. Another item chest to the left of the overlook that you can see the chain from. Then another Satyr. Destroy him and move on to the vines.
Climb the vines down to the bottom and take care of the final judge. Now just head back to the portal and the main area and just destroy the two oynx chains to move on. Do a scene and then fly yourself back up to the very top. Then climb back to the flame room. Easy act.