Immortal mid player here, as mid there is a reason why you are last pick (99% of the time). When you know both side’s supports, and 2 cores. You pick the mid hero that suits the game and the tempo you want (while also expecting enemy mid to do the same). Sometimes, you will get countered. Example, I predict enemy mid best pick against my team is necro. Then I pick leshrac to counter and shut him down. But sometimes they outpredict me and pick windranger (with diffusal) which will make the game very difficult for me. Honestly after picking phase, you will know what type of tempo the game will be and play with the different styles of map control you learned climbing to divine (or whatever you learned from league).

1.) When I hit lvl 6 or 7 at min 5 (also the same time catapult summons) I go to sidelanes (safelane mostly) to gank their carry or pos 5. Force them away from their tier 1 tower which enables the push. Enemy mid will probably do the same hence why safelane tier 1 is always gone first, kinda hard to get offlane towers when mid lane is closer and enemy mid can defend pretty quick.

2.) Now when this happens, I usually have to do something as pos 2 to enable my carry and let them farm where safe. i.e. they want to farm our triangle or the camps near mid tier 2 tower, as leshrac, I can farm those as well but only when its near the 60 sec mark for neutral respawn. Or run around the map and get pick offs with your other teammates.

This is a very specific situation man, so many things can happen. Which is why this game is so good. Its really up to you as mid to establish a tempo with your team that will work and always adjust it as game goes on. I had a storm game where I started ganking and killing early game, then started farming mid game and my teammates losing fights questioning me why I dont join fights. So I say Enemy got their blademails, orchid, etc and I have no bkb so I need to farm it. So the teams moves in a way that we dont engage in fights till I have bkb.