How Grimstroke and Io perform as teammates in Dota 2 7.41e, from ranked matches.
In Dota 2 7.41e, Grimstroke and Io win 51.72% of ranked matches when playing on the same team, over 2,792 matches.
Facing down a core hero tethered by Io is already a problem, and Grimstroke can make that situation much worse. The synergy isn't about them combining their own spells on each other. Instead, they both work to amplify a third hero. If Grimstroke lands Soulbind on two enemies, that Io-buffed carry can suddenly hit both targets with a single-target stun or nuke. This turns a standard gank into a much bigger threat. On a smaller scale, Io can use Tether to grant Grimstroke the movement speed he needs to land a riskier Ink Swell, or to pull him out of a bad spot. The whole plan depends on another core, but it's a decent setup.
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 | 58.22% | 146 |
| Crusader & Archon | 49.19% | 433 |
| Legend & Ancient | 50.00% | 442 |
| Divine & Immortal | 46.73% | 199 |
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 | 51.72% | ▲ +0.9pp | 2,792 |
| 7.41d | 50.78% | ▼ -0.3pp | 24,101 |
| 7.41c | 51.05% | ▼ -1.9pp | 8,701 |
| 7.41b | 52.90% | — | 8,187 |
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Data updated Aug 17, 2026.