Here are the 99 players of the top 100 who have played regular games, ranked by kills per root game.

12.75 wertrew
11.83 KingRussy
11.08 Rafkrik
10.85 BlueMan6°
10.49 michele
10.00 avesano
9.07 Krustalicious
8.86 ghhps
8.74 michl
8.69 naachin.
8.67 Slint
8.58 Miss Click
8.55 arkenkor
8.54 Sabala
8.49 pipacs
8.36 Erathia
8.33 jf220
8.31 Orthros
8.31 yellowfin
8.22 miguelz262
7.79 james bond007
7.75 S3Z0
7.46 Marlon Castillo
7.40 ovbogaert
7.39 Smoke Two Noobs
7.36 Samotny
7.36 IFIGENIUS
7.22 landi
6.96 tyla
6.79 MNML
6.76 Havefun45
6.67 labdalabda
6.62 Qaziyev
6.61 hcdug
6.61 dnaa
6.59 Damarus
6.59 Torudelli
6.56 Verano73
6.54 imalady
6.48 spiritshaper
6.47 ireneo
6.29 TASOS1
6.24 cangelo12
6.22 turk0
6.05 Beach_Bum_13
5.92 Karsten4130
5.89 Lalita Lani
5.81 LifeArrow
5.81 Louis Cypher
5.71 Bart Lee
5.70 SnakePitVenom
5.55 THRILLHO
5.51 aer
5.48 Honyo
5.45 Tsvototi
5.42 gohaus
5.05 DoubleFront
4.91 nonoriginal
4.80 Ezaff
4.78 48430934809
4.70 Help, I'm a rock
4.68 Bendiko
4.44 Matan Fattal
4.38 spman
4.23 JUSTcallmePRE
4.16 BambuVs
4.14 lipos
3.99 cemt2307
3.97 agruev
3.91 Oliversdad
3.77 Boromakot
3.60 @xXxdouglasxXx
3.58 ivv
3.53 k?lllll
3.49 raddar
3.24 Beer Me!
3.24 Nerd Alert
3.09 moulue
3.09 Mitsi the cat
3.04 Maze78
3.02 CriticalDog
2.97 Nippelking
2.94 sews4wampum
2.92 sir dice
2.91 Rileyhemp
2.79 22 apr
2.67 jurgen
2.65 happytoscrap
2.45 Arnas Bro
2.21 Grux
2.14 smokeweedallnigh
2.00 Loobee
1.81 Soromon
1.68 GleepGlop
1.30 euphrates7
1.22 spman4
1.00 no_name2
0.83 saulens
0.58 franklyghost