Here are those among the top 100 scorers who played regular games. They are ranked by kills per square root of the number of games.

27.53 Maggot Brain
24.86 Verano73
23.60 S3Z0
20.87 LemonSong
20.39 cs13
19.16 JamesEnsor
18.87 Farid
18.33 ondrasz
18.17 mgdruss
18.12 charliebrown2000
16.99 gtoo
15.87 InvaderX
15.85 Lalita Lani
13.50 CNADI
12.79 REQQER
12.74 integral
12.66 BaNaT
12.55 wertrew
12.17 Lord Magnus
11.20 Flo.w
10.74 slim p
10.64 Oliversdad
10.30 JFK78
10.13 Dude111
9.76 michl
9.75 peacefrog
9.68 2devi
9.68 champion22
9.66 Black Flag
8.76 pdtkdt
8.73 stakaboo
8.18 raul010
8.13 toms
8.09 Unholy Power
7.99 charlatan1983
7.91 Tsvototi
7.85 Bart Lee
7.82 aminal
7.75 etpicker
7.65 panzer
7.51 BAMMBI
7.41 Beach_Bum_13
7.30 cubchoo
7.12 Glen Carr
7.05 Taxii89
7.00 dzyngis
6.98 IFIGENIUS
6.95 the_king333
6.81 Gamba
6.74 Pishel
6.61 Nicker_
6.61 Hong Kong
6.54 stupeedo
6.48 ivv
6.43 Schabowy
6.43 Noob Slayer
6.30 MNML
6.17 piers plowman
6.17 avesano
6.16 Louis Cypher
6.10 dicebomb
6.07 Ciaran needs poi
5.98 spiritshaper
5.75 Douglas Cook
5.74 TrueBlue
5.57 barry gateaux
5.52 Negromarto
5.41 masticore
5.19 WRXTC
5.17 jerejoonas
5.09 imalady
5.08 Andew
5.07 GodAlmighty
4.99 SOCRATES SLB
4.92 shhtshhhh
4.92 Cassablanca
4.81 EddyB
4.78 TheDarkKnight
4.47 Marlon Castillo
4.45 Ryan L
4.27 Scorpionsfan
4.26 DieNoobs
4.23 Adreu
4.20 Kronk
4.16 Hakanu
4.13 potato27
4.04 ireneo
3.92 sung2323
3.88 HiLLi26
3.62 trypas
3.62 PRESIDENT N° 1
3.61 LeoTheCat
3.28 happytoscrap
2.49 flizza
1.33 spman2
0.00 moulue
0.00 DonnieScribbles
0.00 spman