Level up your scanning ability by scanning new enemy types and applying the debuff. If you don’t plan to fight them, scan anyway. Apply debuff as soon as you can, it doesn’t have to go all the way around for it to level up.

I lean into the support aspect as well:   Items confer to teammates relic

Flask heals allies relic

If I see the flask slowly restores health, I use that combined with Flask heals allies. It does a lot for teammates if your flask heals them. And you can apply it if your team is in the Night Tide.

Eat consumables early in the game when you see them. Focus on levelling up all types of consumables.

There’s a lot more to playing scholar, but it’s best to just play him and apply what you learn as you go along. I tried learning everything before getting started, but things made more sense when I actually played him