I've just done my ED build with my main who is lvl 50 illusion/empath controller which has involved some radical changes, and I have yet to properly test. Here are some of the findings and thoughts I used when doing my ED build.
1. I agree with 1 of the above comments, and I always put a energy reduction in fly.
2. Do you want to PvP, arena or turn villain? When doing missions in Warburg with my Dark Dwarf some of the arachnos minions would turn invisible and I could not see them to attack. I respeced in tactics from leadership to my main to deal with this issue. This also helps with stealthed opponents in PvP or arena.
2. Before ED several empaths went without fitness as they could cycle RA and regen quick enough to do wthout it. Although more difficult since ED it can still be done this way. This gives you 3 more powers to choose, but will force you to limit your energy usage.
3. Since making more use of the leadership pool I have respeced in vengance, in my experience one of the most under used and under rated powers in the game. Hopefully nobody in the team will die but if it happens it is, in my opinion, the best power to stop anybody else from dying and those total wipeouts! Now that all those tankers and scrappers are complaining about all their face plants make use of their corpse and keep the rest of the team alive. Should be really useful in PvP, including base raids.
4. If you are keeping RA (which I recommend) and the fitness power, do you find you need conserve power, or would you be better with another power such as one from the leadership pool?
5. Also pleased to see you have fortitude, again another under estimated power until you have been on the receiving end. I have been in a number of teams were the empath has fortitude but uses it infrequently. If used on the main aggro holder its a great way to help keep them and so you alive.
In conclusion, I have probably raised more questions for you than I have given answers, but in designing my characters I now consider whether I will also be using them for PvP and be able to handle this well or specialise in PvE.