Use MG's to stop their stepping towards. If you want attack use smoke from mortars, artillery officer with smoke ability working good too. I know its not easy, but it's possible. I just love when someone is playing maxim spam on me, ez win.
If you facing this strat as OKW, leave or try to get SturmTiger.
Didnt you read misscommissar threads? Maxims UP
It's a bit up. Before VonIvan, who started this madness on ladder, many players cried here how it's bad. But I think it's need a bit redesign, longer set up time and longer rotation but more survivability and AoE suppres to counter blobs.