Gar Kerensky, on 21 January 2016 - 08:44 PM, said:
This should make it a bit clearer. It isn't rocket science. Kills / Damage does barely translat into PSR.
You pretty much hold your Level if you doing okayish and even get up in a Defeat if your match score is high enough. Damage doesn't say so much in relation to PSR. As it is seeable 293 Damage equals a tie in PSR as does 630 Damage.
TLDR; Don't panic. Get a match score in between 250 to 400 and you will go up in Tier no mather what. If you cannot achieve it you pretty much will stay in your Tier.