Whoa there, Sparky!

[aurance]

Admixture is a fine choice. Generally though, to be worth it, you should apply it to a strong at-will that does not have the damage type you want.

For example, if you have the feats Resounding Thunder and apply Admixture: thunder to Blazing Starfall, you now have an area burst 2, range 10 at-will power.

 

[Peraion Graufalke]

If you have access to DDI, you can build a lightning-based invoker for the heroic tier, though there's no appropriate level 3 encounter power. Starting at paragon you'd have to add thunder powers to the mix (as there's also no lightning-based paragon path), and by epic tier there are no lightning powers at all to choose from, just thunder powers.

A lightning-based swordmage is possible in the heroic tier with Dragon #367 (free issue), but I haven't checked the other tiers.

Also, there's the obligatory storm sorcerer.

 

[mneme]

To breathe every round: take hurl breath. Then whatever you need to boost your breath weapon, and include yourself in the area of your breath weapon (it's an area burst 2; you can do that and still hit something 4 spaces away). In epic, with admixture, adaptable breath, Frost Breath, Thundering Breath, and Freezing Breath, you can use a minor action to push and immobolize enemies every round in addition to whatever you do with your standard action (unfortunately, you can't use the "friendly breath" options as those take you out of the targets for your breath weapon).

 

[Dannyalcatraz]

Sooooo...you're kind of like a sentient lightning grenade. Me likey!

Obviously can't stand too close to allies, though.

 

[DracoSuave]

So if you were to take a Lightning Dagger, and stab yourself in the arm with it as a MBA, you could potentially use dragon's breath every turn. Huh.

If it looks like a bag of rats and it smells like a bag of rats... it's probably a bag of rats.

I can frikken hear the squeakin from here.

Besides that, it's a sorcerer thing, and if you need to bag of rats to get an AoE combo going you're doin'i it wrong.

 

[DarkLord Of DForce]

Wait - guess I missed something.

I know they changed Fire as as keyword on that one weapon, but has WOTC reversed their course again?

So a Radiant weapon now does NOT convey the Radiant keyword anymore (or any mod/keword for that matter)?

Can someone please post a link to that change because no one in our D&D group caught
it...

 

[mneme]

Hell, the hurl breath trick is even more BoR (and, you know, actually effective) than the silly Lightning Dagger one. That said, you've basically got a feature that is either so corner-case that it can't be factored into your plans at all (although it does come with a damage bonus on your breath weapon) or that you have to relax BoR a bit to make work. So if the GM will let it fly, fine; if not, well, it's a fun theoretical optimization.

 

[mneme]

DL: Huh? Of course it does. The fire keyword thing is just a mod of Fire weapons to not do anything at all except to untyped damage; if it works at all it certainly does add the keyword. Damage keywords follow the damage. It's not at all clear whether Wizards will apply that "fix" to the other color changing weapons.

 

[DracoSuave]

Wait - guess I missed something.

I know they changed Fire as as keyword on that one weapon, but has WOTC reversed their course again?

So a Radiant weapon now does NOT convey the Radiant keyword anymore (or any mod/keword for that matter)?

Can someone please post a link to that change because no one in our D&D group caught
it...

No no, changing the damage on any attack does change keywords on powers.

It's just that the lightning dagger, by changing thunder damage to lightning, removes the thunder keyword which makes Stormcheese work so well.

A Crusader's weapon, for example, does half of its damage as Radiant, which adds the radiant keyword to any attack it's used with. (This is actually better for some builds because it doesn't change ALL the damage, thus it doesn't remove any keywords)

 

[Colmarr]

Ta da!

Avenger, Invoker, Druid, Sorceror and Swordmage seems to be streets in front of the other classes.