IMO, all the must-haves are all the powers but Barrage (Although some find use for it), and Stun. Stun just sucks 
Many will complain about Energy Transfer. The animation time is longer than it used to be, yes. But quit screaming doom when you lose your precious DPS. ET's still one of two heavy hitters in the set. Take it.
Seven years of heroism. Seven years of friendships. Seven years of saving the world. Seven years of virtuous selflessness.
You will return, for you are the mighty City of Paragon, the City of Heroes.
With a Nrg/SR, consider skipping a travel power. You are gonna have a tough time fitting in all the powers you want. When i18 hits, Ninja Run+Sprint+Swift is nearly as fast as Superspeed.
They're boosting the speed?
I made an Energy Melee brute and I've grown to like it. Good damage, especially on whirling hands.
Any there any "must-have's" in Energy? It seems very unpopular today...
"If Pro is the opposite of Con, then what is the opposite of Congress?"
Progressman - Level 50 - Energy/Energy Blaster - 500 Badges
~Virtue~