Here are the 98 players among the top 100 players who played regular games, ranked by kills per square root of the number of games.

14.99 wertrew
12.71 Lord Magnus
11.12 H x H
11.07 ProxyCheater
10.21 Kurton
9.17 dirtytrolls
8.89 Drucifer85
8.68 hcdug
8.49 twinky
8.47 22 April
8.37 LololeRastA
8.37 Hero Of Time
8.31 NardSausage
8.11 odoluyurt
8.04 avesano
8.00 simor10
7.83 pdtkdt
7.77 Insulaner15
7.72 Ciaran needs poi
7.59 michl
7.27 slim p
7.21 Batiskayf
7.19 Taxii89
7.18 AmericanHist0ryX
7.14 orgi
6.83 Inuyasha2008
6.82 SOCRATES SLB
6.77 Buttwank
6.76 mcdougs
6.71 Alex Closson
6.68 IFIGENIUS
6.63 kolaps
6.57 panzer
6.54 JBem
6.46 ffbsensei
6.45 TheySeeMeRolling
6.31 integral
6.27 etpicker
6.25 fgfx
5.97 Wuttt
5.95 masticore
5.93 cemt2307
5.91 somerandomguy22
5.76 pipacs
5.66 Plincolpesto
5.64 chronogame
5.61 Beach_Bum_13
5.59 M3r0w1ng3r
5.49 Schabowy
5.40 bogaz
5.32 Andew
5.22 WillDeed
5.13 Captain Ramius
5.07 PartyTemple
5.01 Negromarto
4.98 dragonfly500
4.98 S3Z0
4.94 Lalita Lani
4.88 megaprosper
4.70 Scorpionsfan
4.66 jilm2
4.64 kkkkjjjhhhhggg
4.61 toms
4.48 @HarunKavun
4.46 TooGross
4.31 Chris is King1
4.06 shhtshhhh
4.02 Hong Kong
4.00 MNML
3.98 8 8
3.97 Glen Carr
3.91 ur_angel
3.87 1a2b
3.86 Big Blue Dragon
3.68 Alfred E
3.68 Douglas Cook
3.50 ivv
3.41 saevar
3.39 Nerd Alert
3.26 PeaceToAll
3.21 Honyo
3.13 DonnieScribbles
2.95 spman4
2.75 BaNaT
2.75 Roguerunner
2.45 spman5
2.45 Easy A
2.43 PRESIDENT N° 1
2.39 Slapstick2
2.13 FortSomFan
2.06 ComputerGuy
1.79 spman2
1.73 PureOdyssey
1.70 Grux
1.37 spman10
0.80 B4M069
0.00 gtzlat
0.00 Ars moriendi