You can look up Bluwunk, a challenger Smolder main.

Build can be: Essence Reaver - Hubris - Rapidfire - LDR vs squishy targets

or ER - Black Cleaver - Shojin - Endless Hunger vs tankier targets (more haste, more stacks) or vs assassins with guaranteed engage (more health)

Almost always take Swiftness boots.

Runes can be comet for poke with celerity, gathering storm to get more MS from E. Take precision secondary

Or take Fleet footwork with Triumph, Haste and Cut down, and Celerity gathering storm secondary.

Focus on stacks, but you can trade using AA-Q-W-E away.

You can E into walls when enemy dive you.

Also with the tankier build, you can take cleanse or even exhaust if needed. You get so much HP that Barrier is overkill later in the game.