The Chronological order of Lucian vs. Thresh Fight

Is Dark Passage > The Climb > Senna: Shadow's Embrace

Watching them in this exact order explains how it all started(if you read the story as prequal of dark passage too).

To think it's been almost two years and they've been plotting on bringing Senna back all along, well played Riot, well played.

And as an added bonus, Senna's golden blast was the exactly same one it was teased long ago.