This morning I decided to give the Green Fire quest line another try. I believe I was approximiately i505 last time I attempted, today Elk is sporting a 535 level gear.
This time was completely different. Elk was able to burn through the giant baby head in no time at all. Howl of Fear on the Lost Souls. Gateway across center to give a second avoidance of them. One interrupt of the AOE, but mostly just stayed far back. Soul Leech provided all the healing for the fight. One healthstone in my pocket, just in case..
What I hadn't considered was what came next. The scenario continues up until you fight the big boss Kanrethad Ebonlocke. I had watched a few of the strat videos, and read some strategies, but hadn't actually thought it would continue on.. Top it off, I didn't give myself enough time to research and complete the Ebonlocke fight. A few attempts, where I managed to die on his first chaos bolt, one time I had a soulstone and revived from it, to die from a swarm of imps.
Now that I know I can easily beat the bouncing baby head, I'll try it again; sooner this time.