I think your guide is excellent. I made a real good PvE fire/nrg to lvl 50 b4 u posted this. I took all the primary powers except Rain of Fire and Fire Breath. I took all good blapping powers which consist of Power Thrust, Energy Punch, Bone Smasher, Build Up and Total Focus[/color]. With the secondary, I also got Conserve Power and Power Boost. The only regret I have is getting PB. I took it as my lvl 49 power to help me hold when i took Char, part of the fire mastery pool. I also took hover, recall, TP. Hasten helps alot also when blapping. I am going to respec my toon in a few days to make him more effective PvP wise.
I plan to get rid of Hover, Flares and PB. To replace those powers, I will get Combat Jumping, Super Jump and Acrobatics. I know some of you are thinking, why keep TP? Well, to be honest tp gets me out of a jam in PvP zones. And when some 1 is dying I can take them out of a battle. I'm still uncertain if I want tp foe, but I do think it is a must have for ultimate blapping.