VI
O-I
Assault Heavy TankThe O-I, a tier VI Japan heavy tank: its 3D model and photo mode, its armor with hull down and Optimize angling, its characteristics and modules, and the damage its marks of excellence need on EU, NA and ASIA.
Marks of excellence
Combined damage needed · updated 3 Nov 2026
1st mark · 65%
967
7 d −128 d +4
2nd mark · 85%
1,464
7 d −228 d +11
3rd mark · 95%
1,849
7 d −328 d +27
100% · the best
2,153
7 d −328 d +33
1st mark2nd mark3rd mark100%
| Day | 1st mark | 2nd mark | 3rd mark | 100% |
|---|---|---|---|---|
| Tue 3 Nov | 967+1 | 1,464+1 | 1,849+1 | 2,153+2 |
| Mon 2 Nov | 966±0 | 1,463±0 | 1,848−3 | 2,151−2 |
| Sun 1 Nov | 966−3 | 1,463−2 | 1,851−4 | 2,153−7 |
| Sat 31 Oct | 969+1 | 1,465−1 | 1,855+1 | 2,160+6 |
| Fri 30 Oct | 968±0 | 1,466±0 | 1,854±0 | 2,154−2 |
| Thu 29 Oct | 968+1 | 1,466+1 | 1,854+4 | 2,156+1 |
| Wed 28 Oct | 967−1 | 1,465−1 | 1,850−2 | 2,155−1 |
| Tue 27 Oct | 968−3 | 1,466+1 | 1,852+7 | 2,156+6 |
| Mon 26 Oct | 971+1 | 1,465+1 | 1,845−1 | 2,150−1 |
| Sun 25 Oct | 970+1 | 1,464+4 | 1,846+2 | 2,151±0 |
| Sat 24 Oct | 969±0 | 1,460+2 | 1,844+4 | 2,151±0 |
| Fri 23 Oct | 969+1 | 1,458+1 | 1,840+1 | 2,151±0 |
| Thu 22 Oct | 968+1 | 1,457+3 | 1,839+7 | 2,151+2 |
| Wed 21 Oct | 967+3 | 1,454±0 | 1,832+2 | 2,149+7 |