How about using Kindle Arrows and Conjure Flame, then you can keep your 5/1 Vampiric string I'm sure you have, right?
I don't know what all you could do with a lack of expertise.. That's really the core of doing damage with a bow. BTW.. 10 degen is 20 damage per second. You can do better than that, I think by wanding a target with a conjure. If you really want to use a bow though.. I would run something like this.
I guess you can try these.. I can't say I would reccommend any of them, but these are better than those dam flare spammers. -.-
12 Air Magic/Water
12 Marksman
9 Energy Storage
7 Beast Mastery
Conjure Lightning/Frost
Hunter's Shot/Keen Arrow
Needling Shot
Tiger's/Bestial Fury
Marksman's Wager {E}
Favorable Winds - this skill is NON NEGOTIABLE, otherwise Marksman's Wager may hurt more than help.
Optional - might want to use Freezing Gust, Lightning Bolt, or Lightning Strike - I wouldn't reccommend a 10 energy skill.
Res Sig
Usage: Lay down Favorable Winds well before the battle. Use your conjure spell. A few seconds before the battle, use your prep - Marksman's Wager. Once the enemy is in range, use Tiger's Fury and hit Hunter's (or Keen) right away. Plink away with a couple regular attacks until Hunter's recharges, and use it again. Use res signet when one of your allies falls in battle. Pretty simple.
12 Fire Magic
12 Marksman
9 Energy Storage
7 Wilderness
Kindle Arrows
Conjure Flame
Mind Blast {E}
Hunter's Shot/Keen Arrow
Immolate/Smoldering Embers - this skill, Mind Blast, and Glowering are here only for energy, don't think damage.
Favorable Winds
Glowering Gaze
Res Sig
Usage: Lay down Favorable Winds well before the battle. Activate your prep first - Kindle - then use your conjure. In battle, spam Hunter's/Keen whenever you can. Use Immolate or Smoldering Embers and follow immediately with Glowering Gaze. Do not use Glowering Gaze unless your opponent is on fire! Regardless of whether you take Smoldering or Immolate, you will be able to use this combo every 10 seconds. Spam Mind Blast when you have time to maintain your energy. If you are blinded, or otherwise shut down, you can switch to only spamming Mind Blast and your 2 other spells. The most important thing to remember here is that your conjure spell will NOT work unless you have Kindle Arrows already on you.
Some notes on this build - I actually think it might work the best, but not until Nightfall. (obviously)
Immolate and Glowering will spend 8 energy every 10 seconds for about 90 ish damage. If you go with Smoldering Embers instead, you spend 3 energy every 10 seconds. Mind Blast is really the core here. Targeting a warrior or another ranger is almost a guaranteed way to make your energy steadily rise, and the recharge is only 2 seconds. If you know an enemy monk is low on energy, this can be a good way to make sure it stays that way. *Theoretically* if you are able to find a foe with less energy than you every time this skill recharges, you can net (30*7)-(30*5)= 60 energy per minute. In reality, this will be lower, as you want to actually be attacking as often as possible for more damage. You may also make a mistake, and target a foe with more energy than you, thus not getting the bonus 7 energy from the skill. Still, I would hedge my bets on this build out of the 3.
I can't warrant taking Dual Shot, especially with no real energy management. =x Unless.. lol this is gonna be funny.
12 Fire Magic
12 Marksman
11 Energy Storage
2 Wilderness
Ether Prodigy {E}
Conjure Flame
Kindle Arrows
Hunter's Shot/Keen Arrow
Dual Shot
Favorable Winds
Liquid Flame
Res Signet
Usage: Lay down Favorable Winds before the battle. Kindle must be activated first, then conjure, like the last build. Start off with a Dual shot and immediately follow with a Hunter's or Keen. Use Ether Prodigy when needed. Switch to a bow that has negative energy, (or a shield and weapon with the same effect), when Ether Prodigy ends to avoid the damage. Use Liquid Flame when you can, and try to hit an enemy that's casting a spell. This will most likely be an enemy necro or elementalist.
The first build, you must use a lightning or ice string. The other ones, you are free to use what you wish. In fact, the last build just has Kindle on there to get the fire bonus without wasting a string.
Most of these builds use spammable 5 energy bow attacks. 10 energy attacks are obviously more effective, and also impossible to run on an elementalist. In fact, 5 energy attacks might be impossible also, I wouldn't know.
You can also try a build with Thunderclap and Conjure Lightning.. your energy will suck, but it's funny to watch. Once again, all these are just FOR FUN but I tried at least a little to make them somewhat viable. XD *laughing at this post*
(If someone could test these builds in Isle of the Nameless and post back here that would be awesome.. I don't have an elementalist, so yeah.)