How Slark and Io perform as teammates in Dota 2 7.41e, from ranked matches.
In Dota 2 7.41e, Slark and Io win 57.53% of ranked matches when playing on the same team, over 897 matches.
Thinking of Io as a passive, defensive support is a common mistake with this pairing. The reality is that Io enables an incredibly aggressive version of Slark. Tether's movement speed makes it nearly impossible to escape a Pounce, and Overcharge fuels Slark's attack speed for faster Essence Shift stacks during a gank. This also makes him much harder to burst down before he can use Shadow Dance. The combination turns Relocate ganks into almost guaranteed kills across the map, allowing the duo to snowball the game by picking off any hero caught out of position. Io provides the sustain and mobility that lets Slark play at a pace few lineups can handle.
How this pairing performs across skill brackets — the duo's team win rate in recent ranked matches, split by average match rank. Ranks with too few recent matches are omitted. These rows use the last 30 days of quality-filtered ranked matches, all patches in that span combined — a wider window than the patch-scoped count above, so the per-rank match totals can exceed it.
| Rank | Team win rate | Matches |
|---|---|---|
| Herald & Guardian | 57.14% | 266 |
| Crusader & Archon | 53.06% | 833 |
| Legend & Ancient | 54.52% | 642 |
| Divine & Immortal | 53.75% | 307 |
This duo's team win rate in each recent balance patch — whether the pairing is trending up or down. Patches without enough matches are omitted.
| Patch | Team win rate | Change | Matches |
|---|---|---|---|
| 7.41e | 57.53% | ▲ +5.7pp | 897 |
| 7.41d | 51.82% | ▼ -1.5pp | 54,581 |
| 7.41c | 53.31% | ▼ -1.3pp | 30,158 |
| 7.41b | 54.58% | — | 39,990 |
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Data updated Aug 11, 2026.