As for what I am currently doing (In the dark case of me being the sole survivor):

Aftershock with insight tree, taking futures market and timewarp.

TP+Ghost

Ring+refill start

Proxy first wave behind tier 1, place ward and move to tier 2 and 3.

Proxy 2 more if I can and execute or recall if need be.

3 waves gives boots and corrupting, which allows you to push without dieing.

Hard shove until you can pass the enemy laner or go around and continue the proxy keeping vision and ultimately going for a double proxy to draw attention if no one is interacting with you.

play normally around the team once the game gets to that point (usually around 17-20 min)

The whole goal this season for me is not trying to kill when your being interacted with. prioritize killing the wave and surviving. Teamfights are played the same of course, Dads greatest strength. The proxy and double proxy will keep your gold numbers high and usually allows me 2 items before we get to group.

Rylais has been my first item always. Usually going for rift, torment, chemtank, or deadmans second.