Other than the demand for a dispell prot. for immo, what was the point of your post? I didn't really understand what you are talking about with the banes and corruption?
In PvE you don't use Felflame unless you really HAVE to(e.g heavy movement), you re-apply Immo instead, so I don't understand your comment on Felflame either.
Maybe add 10% more crit to Fire and Brimstone like it was in Wotlk and it would be more than fine. Dispel protection is not an issue due to Burning Embers.