Best Dota 2 duos

The strongest two-hero combinations in Dota 2, ranked by confidence-adjusted win rate when both heroes are on the same team, from the last 365 days of OpenDota's parsed public matches (minimum 30 games per pair).

#	Duo	Win rate together	Games
1	Dark Seer + Bounty Hunter	67.3%	55
2	Sniper + Treant Protector	67.5%	40
3	Sniper + Abaddon	64.2%	53
4	Windranger + Dawnbreaker	59.5%	121
5	Sniper + Ogre Magi	57.1%	224
6	Axe + Sniper	58.8%	136
7	Sniper + Rubick	57.1%	212
8	Sniper + Dark Willow	62.7%	59
9	Sniper + Jakiro	58.0%	143
10	Nature's Prophet + Bounty Hunter	64.4%	45
11	Bounty Hunter + Pangolier	61.9%	63
12	Earth Spirit + Dawnbreaker	62.1%	58
13	Shadow Fiend + Bounty Hunter	61.3%	62
14	Treant Protector + Dawnbreaker	62.3%	53
15	Vengeful Spirit + Lifestealer	65.6%	32
16	Vengeful Spirit + Beastmaster	65.6%	32
17	Sniper + Hoodwink	60.3%	63
18	Sniper + Dawnbreaker	61.5%	52
19	Bounty Hunter + Snapfire	62.2%	45
20	Tiny + Sniper	57.4%	94
21	Rubick + Dawnbreaker	53.6%	237
22	Shadow Demon + Dawnbreaker	58.8%	68
23	Juggernaut + Dawnbreaker	58.8%	68
24	Pudge + Vengeful Spirit	57.3%	89
25	Windranger + Sniper	57.5%	80
26	Sniper + Snapfire	55.5%	119
27	Monkey King + Dawnbreaker	59.0%	61
28	Lich + Sniper	55.3%	123
29	Tiny + Vengeful Spirit	60.9%	46
30	Sniper + Death Prophet	62.9%	35
31	Lion + Sniper	53.4%	189
32	Mirana + Dawnbreaker	60.4%	48
33	Sniper + Silencer	56.3%	96
34	Nyx Assassin + Dawnbreaker	58.2%	67
35	Earthshaker + Tusk	62.2%	37
36	Sniper + Beastmaster	59.6%	52
37	Sniper + Phoenix	57.0%	79
38	Tusk + Dawnbreaker	52.4%	229
39	Phantom Lancer + Slardar	61.5%	39
40	Lone Druid + Dawnbreaker	61.5%	39
41	Earthshaker + Gyrocopter	61.0%	41
42	Sniper + Necrophos	61.0%	41
43	Huskar + Dawnbreaker	61.0%	41
44	Witch Doctor + Dawnbreaker	58.1%	62
45	Anti-Mage + Invoker	60.5%	43
46	Slardar + Sniper	57.6%	66
47	Anti-Mage + Rubick	56.9%	72
48	Earthshaker + Timbersaw	59.6%	47
49	Witch Doctor + Sniper	59.6%	47
50	Bounty Hunter + Centaur Warrunner	59.2%	49