INDEPENDANT

Round 1 Survive and do damage for points, you don't have to be a menace then you can catch then off guard from next round eso round 3.

Or from round 1 be a menace and push squishys shooting from mid range and then close up chase to finish (you may die more but can be worth the risk)

Round 3 when you seriously start being your own support and rely on speeed shooting to take advantage of 30 extra weapon damage from 1st power. With the fast reload you will get constant healimg from 2nd Power which will make you self relient and suprise enemies attacking you.

Round 5 onwards is slight personal preference depending on who you are facing. If its lucio get the burning ability, genji constantly flanking you get double barrel and shotgun away etc.

Towards the last 3 rounds you should be fully independent and less reliant on team for healing. You can flank and fogot about hiding behind rein's shield and just poke little by little till they get more scared then you push for the kills.

Ill add vids if i get enough likes.