Hello, I wrote this for somebody else asking about the new Jungle items. I didn't write anything for the enchantments, but this should give you a general idea bout the Smite upgrades:
- Poacher's Knife: The main Counter Jungling item, this item is designed to benefit dedicated Counter Junglers the most. Realistically speaking, Nunu is basically the only champion that uses this item well.
- Ranger's Trailblazer: The main Power Farming item, Blasting Smite helps out the champions who need help sustaining the most and is regarded as the easiest and most universally applicable Smite to use. All champions can use this item to successful degrees, but I personally best recommended on most tanks and/or champions with weak early games.
- Skirmisher's Sabre: Challenging Smite is weird in concept compared to execution. It's supposed to be a dueling item, however if you're going out of your way to look for duels, you're probably already ahead of the enemy team's duelists and likely don't require Challenging Smite at all; in fact you probably would want Chilling Smite (the next one) more if this is the case. Personally, I like the idea of using this item on Assassins and off Assassins, as its damage potential is the greatest, and the damage reduction it offers can help protect an Assassin from their target counter attacking.
- Stalker's Blade: Generally noted to be the ganking item, this Smite is easily the best in my opinion when you are either already ahead or can set your teammates up to snowball. It has the ability to slow champions (going to be reworked to a movement steal) which means movement-speed-based enemy laners are especially prone to your ganks. It grants every champion utilizing it more sticking power, and in general is powerful on powerful gankers, snowballers, or Hyper Carries/Raid Bosses.