How Dark Seer and Io perform as teammates in Dota 2 7.41e, from ranked matches.
In Dota 2 7.41e, Dark Seer and Io win 47.95% of ranked matches when playing on the same team, over 1,783 matches.
Putting Ion Shell on an Io-tethered carry sounds like a good way to apply pressure. The main issue is that both of these heroes are enablers. Dark Seer wants to use Surge and Vacuum to set up his team, while Io wants to use Tether and Relocate to empower a damage-dealing core. They often end up competing to support the same hero rather than complementing each other with distinct roles. If Io tethers Dark Seer himself, there's not much kill threat, as neither hero brings significant burst damage. They don't provide the follow-up for their own setup, leaving the draft reliant on other heroes to secure kills, which can feel inconsistent.
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 |
|---|---|---|
| Crusader & Archon | 45.49% | 288 |
| Legend & Ancient | 45.93% | 270 |
| Divine & Immortal | 48.82% | 170 |
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 | 47.95% | ▲ +1.1pp | 1,783 |
| 7.41d | 46.89% | ▲ +0.6pp | 14,122 |
| 7.41c | 46.25% | ▼ -1.3pp | 4,130 |
| 7.41b | 47.53% | — | 4,216 |
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Data updated Aug 17, 2026.