When is 'Challenging Smite' a viable option for top laners

I saw some top laners who use smite and teleport as spells and (if I'm correct), it's becoming pretty regular and although I don't play as a top laner, maybe when I have to adjust, I know I may find this useful.
My questions are when and who :
When to use it / what are some of the conditions needed since it was told that this strategy isn't always going to be useful in every top laner,
Who are the champions that will really take advantage of this?
Best Answer
The focus is on Cinderhulk rather than smite. It is 100% gold efficient at 600 pre-Cinderhulk health (so basically any character), not including the immolate passive (which is the big reason people want it). Its immolate burns for 9 less damage than Sunfire, but increases based on time in combat to as much as 8 more damage/second than Sunfire.
It is good on any character that wants a cheaper Sunfire Cape, but can afford to not have flash. This typically applies to tanks/bruisers, particularly those with mobility (think Renekton).
Both Stalker's Blade (chilling smite) and Skirmisher's Sabre (challenging smite) are viable build paths, depending on whether you are having trouble chasing your lane opponent or winning trades, respectively.
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Why are top laners taking Smite?
So, they can take Smite top lane, roam the map, and dictate the pace of the game like a second jungler. \u201cThe way it works is basically to have the threat of invading enemy jungle with smite while aiming to get your mid and bot lane exponentially ahead in gold and items,\u201d Lourlo explained.Why is Janna top Smite a thing?
Challenging Smite can be cast on enemy champions to mark them for 4 seconds, reducing their damage against you by 20%, and empowering your basic attacks and abilities to deal 48\u2212125 true damage to them over 2.5 seconds (depending on level).Can you use challenging Smite on champions?
The playstyle for Janna Top is generally to leave the lane right away, be a nuisance around the map, make ganks and steal camps from the enemy jungler. Janna's passive gives her and her allies bonus movement speed, helping her to roam.Wendy Pretend Play What To Do When Kids Get Lost
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Answer 2
This is extremely good on tanks that want a sunfire cape as you can buy the Cinderhulk enchantment and be set. This is a very efficient way to play. This works best on champs that can afford to not take flash as they have alternate escapes.
Note: For most cases you will use the Rangers Trailblazer
E.G. Jax's Q
You can also use the stalkers blade If you are ahead but want a slow to help with chasing.
Build Skirmishers Sabre when you are playing an attack speed champ like Fiora or Warwick. Actually a Youtuber named Foxdrop has actually created guides on Warwick and Fiora top with smite.
Never EVER build the Poachers knife. As of patch 5.7 the item is just not worth it, and also you will be in lane so you will not be able to counter jungle.
Hope this helps!
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