Make Channeling more useful

Channeling is a very neat enchantment in concept and has one of the coolest sound effects in the game. Unfortunately the fact that you can only use it in thunderstorms makes it effectively worthless, except for the players farming mob heads. It's locked to very rare occasions in specific biomes so casual players are unlikely to ever use it. So here is a suggestion for changes to the enchantment.

-Make Channeling work without a thunderstorm. Throw your lightning wherever you want, become Zeus! Obviously this would make the weapon a bit too OP, so when out of a thunderstorm the lightning only does 4 damage and has a recharge of 10 seconds. When in a thunderstorm, however, the lightning has a recharge of 5 seconds and deals 6 damage. Both strikes set the target on fire like a regular lightning strike, but outside of a thunderstorm the surroundings are not burned--food can be cooked from a distance. When the target is under a block/is submerged in water or lava, the enchantment will not work. Thunderstormless lightning will not have effects on mobs that are changed by lightning.

-Make Channeling into a treasure enchantment. Being able to summon lightning from the sky is a bit strong for a regular old enchantment table. If you have to hunt for it, it'll be much rarer and will feel like more of a challenge. This balances the buffs to the enchantment.