So, I wanted to end soloing (at least for a few months) with something better than Maloriak, and Ragnaros was my last chance - glad I could make it.
A boss that provided a lot of challenge yet possible with 491 ilvl gear, definitely as fun as my Lich king solo - making up strategies, refining them, then executing them near-perfectly, that's what I call fun :)

The full strategy guide can be found at http://elitistjerks.com/f74/t43955-hunters_soloing_old_instances_fun_profit/p82/#post2244841