The correlation between Assists and Deaths is 0.57. The more Assists, the more Deaths, and vice versa. But some values are higher than expected, some are lower. Efficiency is a difference between the value of Deaths depending on Assists (blue dots) with respect to the expected value (red line).
Efficiency
Huskar 2.9447
Techies 2.4254
Witch Doctor 2.1956
Pudge 1.8578
Lion 1.8463
Shadow Shaman 1.8392
Enigma 1.6685
Axe 1.6135
Nyx Assassin 1.5524
Broodmother 1.3697
Vengeful Spirit 1.3574
Crystal Maiden 1.2626
Legion Commander 1.2340
Marci 1.1612
Leshrac 1.0382
Clinkz 1.0058
Batrider 0.9821
Doom 0.9296
Dazzle 0.8548
Monkey King 0.8035
Nature's Prophet 0.7891
Lich 0.7802
Shadow Fiend 0.7542
Timbersaw 0.7393
Lina 0.7127
Bristleback 0.6636
Clockwerk 0.6618
Beastmaster 0.6569
Ursa 0.6538
Viper 0.6325
Skywrath Mage 0.6214
Troll Warlord 0.6136
Tusk 0.5961
Venomancer 0.5896
Winter Wyvern 0.5560
Shadow Demon 0.5544
Slardar 0.5302
Silencer 0.5275
Pugna 0.4668
Jakiro 0.4513
Bounty Hunter 0.4405
Earth Spirit 0.4392
Sand King 0.4290
Earthshaker 0.4061
Chaos Knight 0.3819
Elder Titan 0.3497
Razor 0.3458
Enchantress 0.3110
Rubick 0.2892
Omniknight 0.2826
Bloodseeker 0.2501
Bane 0.2238
Phantom Assassin 0.1962
Slark 0.1568
Ogre Magi 0.1257
Meepo 0.1253
Undying 0.0942
Dark Willow 0.0625
Drow Ranger 0.0363
Necrophos 0.0208
Windranger 0.0080
Snapfire -0.0042
Luna -0.0193
Muerta -0.0217
Tiny -0.0229
Ancient Apparition -0.0325
Death Prophet -0.0518
Riki -0.0743
Magnus -0.0788
Phoenix -0.1207
Grimstroke -0.1426
Gyrocopter -0.1778
Disruptor -0.1939
Spirit Breaker -0.2266
Mars -0.2719
Primal Beast -0.2793
Alchemist -0.2940
Sniper -0.2949
Outworld Destroyer -0.3044
Juggernaut -0.3089
Dawnbreaker -0.3141
Arc Warden -0.4054
Storm Spirit -0.4172
Terrorblade -0.4468
Templar Assassin -0.4971
Sven -0.5319
Dragon Knight -0.5796
Underlord -0.5874
Void Spirit -0.5947
Lifestealer -0.6530
Visage -0.6758
Centaur Warrunner -0.6869
Morphling -0.6941
Weaver -0.7310
Pangolier -0.7355
Tinker -0.7384
Night Stalker -0.7692
Oracle -0.8047
Ember Spirit -0.8495
Chen -0.8741
Io -0.8949
Anti-Mage -0.9000
Puck -0.9033
Hoodwink -0.9299
Brewmaster -0.9500
Dark Seer -0.9640
Treant Protector -0.9924
Tidehunter -1.0230
Faceless Void -1.0665
Abaddon -1.0693
Keeper of the Light -1.1543
Warlock -1.1689
Kunkka -1.2417
Queen of Pain -1.2807
Mirana -1.3070
Lycan -1.4089
Invoker -1.4321
Lone Druid -1.4546
Wraith King -1.5042
Phantom Lancer -1.5262
Naga Siren -2.1244
Spectre -2.1567
Zeus -2.1933
Medusa -2.3150