Level 100 Doom Bots are Impossible.

If you haven't realised yet, doom bots are out as a rotating game mode. The Teemoing is great fun and possible to beat, however the Level 100 version is impossible. Max health damage on champions is bugged, so Illaoi, Sion, Mundo and all the others deal 0 dmg. I don't know if this is intentional, but if it is then this mode just can not be done. Any one else experienced this?