Parsed todays rankings out of curiosity. Tomorrow we'll see who managed to abuse this mess the most. :P
None of the top 20 should have a chance to improve their score legitimately though, as there is no mission that gives 80 points or less.
*Grabs some popcorn and waits for reset*

1 10780 Sirocco 26758
1 10780 BadRiddance 5721128
3 10770 Sora 4800993
4 10760 blubber 4401508
4 10760 Jaded 7206275
6 10740 Kalin 27167
6 10740 Madnug 1542672
6 10740 xelloss1012 1837607
6 10740 AsD2038 7061961
10 10730 Astluh 22645
10 10730 adritk94 35838
10 10730 Bam 591719
10 10730 VERYVOODOO 1318886
10 10730 Xellosp 1341352
10 10730 nonsensei 2068243
10 10730 mlw61520 4053461
10 10730 Kuroi 6043387
18 10720 Shiro 8840
18 10720 ArturPL 83801
18 10720 Mira 149959
18 10720 Rori Juice 1316135
18 10720 ymn 1956084
18 10720 Meaqua 4464699
18 10720 awspe 5096383
18 10720 Geidt 5347086
18 10720 SwampyKong 5538729
18 10720 idkev 6247316