I made a bunch of content for Spark in 3.17, from day 1 to 2 gearing, to mid and late league build deep-drives, and also guides on how to boss with the skill, which can also be found in this playlist: https://www.youtube.com/playlist?list=PLGPotsSEuoQHojDFcXXlg66wxd0VZClLp

The video in this posts main link is an explanation of how to go through the leveling process, which I hope is useful no matter what Spark build guide you end up following for post-storyline. :)

https://pastebin.com/Rhn566WK