After using lightning mainly as a close combat weapon for a while, I noticed that 12 points is way too high of a price. Basically, the price of a weapon is determined by how easy it is to get kills in most situations, with the exceptions of killstreak potential/cost for nukes/cannons and the like. Shotgun has utility for almost all maps and most players are vulnerable to it with additional blocks used to target the upper part of the hitbox. The same is true for rockets, except that it's even easier to get high kill streaks and take out good players, this justifying the cost of 15 points.
The prices of weapons can, of course, only be determined in relation with other weapons. Mortars and C4 (and distinctly other weapons, too) show that the cost of lightnings should be lowered, probably in the range of 8 points per use. Aside from accumulating much higher killstreaks with additional upgrades, mortars and C4 both take much less uses to get a kill than lightning. Its small radius and fixed roofs on many maps make it a point waste, even though it takes much more skill to gain kills with it. Some people might say that obtaining easy kills from pillars justifies a cost of 12 points, but pillars are rare and mortars are the cheaper and better alternative (if you can count blocks in 5 quickly). Lightning at its highest potential is even less effective than a 5 range pistol, which makes it obvious that its cost should be at least somewhere between mortar and pistol, possibly 8.
Edit: Also, the fact that I use lightnings is not a good 'argument' against this.
The prices of weapons can, of course, only be determined in relation with other weapons. Mortars and C4 (and distinctly other weapons, too) show that the cost of lightnings should be lowered, probably in the range of 8 points per use. Aside from accumulating much higher killstreaks with additional upgrades, mortars and C4 both take much less uses to get a kill than lightning. Its small radius and fixed roofs on many maps make it a point waste, even though it takes much more skill to gain kills with it. Some people might say that obtaining easy kills from pillars justifies a cost of 12 points, but pillars are rare and mortars are the cheaper and better alternative (if you can count blocks in 5 quickly). Lightning at its highest potential is even less effective than a 5 range pistol, which makes it obvious that its cost should be at least somewhere between mortar and pistol, possibly 8.
Edit: Also, the fact that I use lightnings is not a good 'argument' against this.