I do 150k+ damage in a ranked match with Tyra and Viktor. I get 150k+ healing with the good supports like Jenos, Furia, Ying, and Io. I got the shielding one with half shell Makoa in casuals.

All you really need is a 4-3 game. In a 4-3 game, you should easily get 150k+ healing, damage, and shielding. If you aren't in that game, then something is wrong.