I've made a new solo legendary vid for TMCC, with data pad locations pointed out (usually just via text), misc achievement reminders (like the easter egg ones), and tips here and there. It is designed to be approachable so there are no crazy speedrunner skips or despawns except for the gate glitch on Nightfall since it's easy. Some parts are sped up for brevity but it shows more or less my path through the game.
OR if you wanna take the easy route, see my LASO solution. Save/quit at the end of each mission then load up the non-modded PC version or XB1 version to complete the mission for credit.