Heya, I've found a way to bypass the unsoloable Galakras in SoO using the grappling hook/heroic leap. This lets you do Iron Juggernaut and beyond without needing someone else in the group.
Props to Shiekrunner that posted the DH guide here to bypass him proving it can be done, I just found the path to do it as either a rogue or a warrior. Tested on both characters and it works perfectly fine.
Just follow the path in the video, substituting Grappling Hook for Heroic Leap if you're a warrior, obviously. There's probably a more optimized path but this work fine.