Suggestions for a build

I currently have a elementalist/mo though I dont use anything but elementalist skills until I do heros challange. Anyways i wanted to know which best suits me depending on the following but do not suggest any elementalist builds secondary or primary:

I prefer to have alot of energy or fast energy regeneration.
Skills that actually have some damage to them
Skills with low energy cost if not a way to reduce the cost.
Prefer not to be a primary warrior because I like staying back and killing.

If you could list some pro's and con's to each build it would be nice but not required. Thank you for taking your time to help someone unlike the community IN the game.. (Its annoying when no one answers but everyone will spam trade in general and trade).

I think a counter question would be: Do you want your build to be PvP or PvE? They are very different concepts and builds which excels in one would not do good in another.

And if you want to stay back and kill WHILE not being an elementalist....you pretty much have to be a ranger then. I'm not saying other classes can't "kill", but in the more traditional sense of direct damage dealer, then ranger is the way to go.

Go look up at all those basic profession threads and see the builds in them.

I have a ranger and from what ive seen its sucked in pve.. Doesnt do much damage. Is it that i dont have the right skills or that expertise isnt high enough for me to be able to use attacks constantly enough or what? It would be pve until i reach tombs.. then more pvp then pve..