I'm always really hesitant to recommend a build guide where the defense partially consists of 'kill them fast and offscreen', but I think alot of people want to play Spark and it can definitely work as a strict mapper, at least.
I made a mockup for a life based inquisitor leaguestart with Spark+OOS. I wouldn't really call it a build guide, but more of a point to springboard a discussion off of. Its obviously subject to patch notes but I don't forsee that to change anything fundamental here.
Would love opinions on this 'day 1 of league' focused video, as I haven't played Spark since Synth league.
POB: https://pastebin.com/Uq9FMGaq