If you’ve started playing recently, I’m just wondering if you’re a PS5 player?
You’ll not have access to the scoreboard if so, unfortunately, but suffice it to say that 1.7million points of damage is an insane amount! Havoc 40 is always going to give the opportunity to score more, but by way of example most people playing the ‘standard’ game mode on the toughest level would be extremely happy to hit 700,000 … that’s the last 5% skill ceiling being seen right there! (kudos @MeowBeep !)
I loved Psyker once upon a time, but my style has been slowly whittled away, and I’m very average with the class now. If you’re looking for advice, albeit some slightly out of date, then may I suggest a read through of the class suggestion pages: The Psyker Atheneum