I've tried soloing it before but I couldn't get the hang of it. This was quite a while ago, right at the start of Warlords, and I've never bothered to go back. I honestly wish they'd just make it skippable or just tone down the roll mechanic slightly for people who are solo. Or allow me to stand in the fucking middle without triggering the roll. That was something that really annoyed me the first time I tried it.
Like I get the logistics of it and all that, but the timing is tricky with those flame fuckers.