This build is more focused on the Physical aspect of Ember Spirit, It is not a tanky build but it is very useful as an "Assasin type" build. You can one shot people with this build as long as you stay at the back of your team.

This build is also meant to be played on the midlane since it focuses heavily on the early game potential of Ember Spirit.

Sleight of fist has been buffed and its level 1 cooldown is now less, meaning it's much more spammable and you can trade a lot more. The faster you get maelstrom and drums the faster you can team fight, remember to respond to potential team fights near tower since you can get some kills with a level 3 SOF easily.

There is a situational build under this build for a Magic build Ember Spirit. That build requires practice on how to cycle the remnants properly with refresher, and to keep the debuff or root from gleipnir and chains up all the time.

If the game is going well, and you're ahead, you'd be able to fight endlessly with corrosion and just maelstrom, getting BKB will almost always ensure you'll win the game if you can get an early timing for it.

If you're losing, I would suggest go aeon disk and boots of travel so you can split push and force enemy reactions to prolong the game for your carry and other core to recover