Here are the top 98 players who played at least one regular game ranked by kills per root game. Jurgen and elvissey did not play any regular games.

16.95 wertrew
11.39 818L8
11.30 michele
10.58 dinko009
9.80 convolution
9.71 stakaboo
9.39 arkenkor
8.93 Maze78
8.78 NardSausage
8.73 tyla
8.69 Beach_Bum_13
8.49 AlexKon
8.38 Scammer
8.33 Drakjee
8.23 ovbogaert
8.16 IFIGENIUS
8.13 Sabala
8.12 ahnbohwan
8.01 Captain Ramius
7.92 tstj
7.88 Samotny
7.87 Lalita Lani
7.81 SnakePitVenom
7.64 jf220
7.56 kolaps
7.31 generalissimus S
7.07 Verano73
7.05 Jund
6.98 seeb
6.91 48430934809
6.84 Linox
6.72 miguelz262
6.60 Bart Lee
6.54 prymus
6.52 avesano
6.32 Damarus
6.20 Marlon Castillo
6.15 Zigua
6.04 landi
5.96 panzer
5.88 Az_Balu
5.79 moulue
5.77 spiritshaper
5.76 Erathia
5.75 Snoopyface
5.70 alex_sfb
5.57 happytoscrap
5.56 LifeArrow
5.54 sir dice
5.27 Created
5.14 Three_Blind_Dice
5.11 4november
4.96 canzianinoob
4.92 SmokingJoker
4.88 @xXxdouglasxXx
4.80 anythig
4.78 ireneo
4.64 Volvic
4.45 Zyzas
4.43 LearnToLive
4.37 Soromon
4.09 Orion369
4.04 flizza
3.93 TheDarkKnight
3.81 ivv
3.72 hyperfine_transi
3.65 greeen
3.61 ReyDeTrolls
3.57 SparHawk
3.45 rofarah
3.33 Chris is King1
3.22 GleepGlop
3.08 piers plowman
2.94 sews4wampum
2.86 22 April
2.82 spman
2.80 PerfectI
2.68 Ezaff
2.55 hektror1995
2.54 spman7
2.27 ????
2.14 spman10
2.14 spman5
2.12 spman4
1.97 spman9
1.62 wool
1.51 gameboy
1.41 franklyghost
1.38 spman6ver
1.31 Nerd Alert
1.30 Kurwa_pendecho
1.07 Loobee
1.00 spman3
0.90 k diva
0.90 Arnas Bro
0.50 saulens
0.46 spman8
0.36 spman2