After years of reinveinting the wheel of making script writing tools, I found Ink. Seems to be a great open source tool for writing, very lightweight and robust for dynamic dialogues.
Best part is the scripts can be imported into the Dialogue System unity asset I've been painfully integrating into Stellaren. DSU It gives me diverse options for quests, items, conversations, as well as keeping track of items, and other variables throughout the journey.
I guess I'll see in the coming weeks how it'll pan out. I hope this is the right solution.
See Ink - https://www.inklestudios.com/ink/