How high was the Tier 20 Arena last week?

Someone told me the last cutoff was at 5700 man. I'm not sure if it's accurate but since im near your range and didnt get close to staying Tier20, I wouldnt put my hopes up in your stead.

I don't think that is enough. I believe you need 5000+. I personally don't have any super merged units, so the max I can get is around 4950, and I had gotten around that score for many months but had yet to stay in Tier 20 ever. You will usually get push out of the "staying" bracket at the last day. Though, I am not completely sure if that is the same for every region.

About 2 or 3 weeks ago I had over 5040 (my best score so far) and get pushed to T19. During weekends many people increase their hight score to stay in T20. I doubt that 4954 would be enought.