It's been a while since I aimed high in silver, but as far as I'm aware it hasn't changed too much. You should be aiming for around 1.2-1.5 million points for top 10% because you need to break clear of all the players that stopped right after the last milestone at 890K and ended up somewhere near 1M. Flat top 10 I'm really not too certain on because it's quite temperamental. I'd generally say 2.5M on a quiet day (or three quiet days in a row) but really if you're desperate for it you would essentially aim as high as you could bring yourself to go.