Hmm, I play a fire ele quite often. I have 102 energy and rarely go below 50 energy unless I die or it takes longer than usual to defeat the mob.
I like Savannah heat with an arcane echo as suggested earlier. I would never echo Searing Flames. The recharge on SF is already low enough to make it spammable.
One of the biggest mistakes newbie fire eles make is putting Flare on their bar. Flare is one of the first skills you get and it's totally awesome against those low level mantids and termites!!! However as you progress, you'll earn much better skills and it's time to put Flare back in the closet.
I like Liquid Flame. Good fast punch to an area that kills an enemy which is close to dying.
Glowing Gaze is a nice energy management skill that pairs well with SF.
Searing Heat and Tenai's Heat are 15e AOE skills. They are identical and at least 1 should be on your bar. They are a slightly worse version of Savannah Heat.
Meteor Shower - Hmmm, well Dredd likes it. I don't. It's cast time is 5 seconds and a long recharge. This means youll only get it off once in a fight. If you're lucky. In Pve I've found that my heroes and henchies have the mob mostly dead by the time i'm done casting. In PvP, you'll never get it off. Any decent player will interrupt you first.
On the other hand, it is useful in specialty builds. I use it in many solo farming builds. It can also be used well in pvp if paired with Glyph of Sacrifice and coordinated with your teammates so that they are keeping your victim pinned down in the meteor shower.
Avoid a lot of spells that require you to get close up and personal with a mob. Starburst, Lava Font, Inferno, Bed of Coals fall into this category. Just remember you're a nuker, not a tank!! You're squishy!!! If you run into a mob of Level 20-24 enemies screaming BURN YOU DEVILS BURN, your monk is liable to ragequit on you while he screams some terms that holy men just shouldn't be uttering.
Fire Attunement - Have i mentioned this one yet? Put it on your bar....NOW! Keep it on your bar and anytime you are outside town this skill should always be up and running on you.
That's it for now. Have fun with your nuker. Yeah, pretty little yellow numbers are nice.