Hey, so here are the questions that I can remember right now.
Draft pick: Banning strategies, good team combos, how to counter specific combos like double tank/no mm/single mm etc. Also if there are any other things to keep in mind.
Counters: Counter heroes, recounter heroes, how to deal with counters, item counters, recounters.
General Gameplay: When to push tower/gank/jungle/turtle/lord/team fight/split push. How to predict enemy movement. When should you be aggressive vs defensive etc. Or any other general Gameplay guide.
Roles and rotation: how is different to play different roles. I know basic differences and have seen some guides, but nobody goes into detail of how to best play a specific role. Like lane/split push/gank/rotate/jungle etc.
Stats: how stats like magic pen/resist/armor/armor resist work etc.
Common gameplays and how to counter them: like if enemy is pressing one lane with 4 people, or if enemy assassin is roaming and killing a lot, how to counter them.
Lastly: What is it that separates an epic player from mythic, what do mythic do differently. How to achieve mastery on heroes. Everyone watches same guides, but some people are way better than others even with straightforward heroes like Ruby/chou.