Set yourself by the line of VP, wait for attack, force retreat, move in grens to decap, place MGs little further, don't be greedy, don't advance too much, get back to MG line, have 251 behind and pios nearby for reinforcement and MG repairs.
You don't need to worry about the map control(and therefore mobility) that much, because its 2v2 and you have OKW partner for a reason there.
I don't use mortar or mines, but mines actually sounds good for flank protection.
You don't need LMGs with this setup, because you are suppose to outlast, not outdps opponents and suppressed cons can't fight back.
What he said is reasonable and similar to what I use.
2 HMGs, pios and 251 is the key here.
Excalty this.
I forgot about 2 flamers pios.
S-mines are useful because I can cover MG with each other increasing its power. With empty flank I would be forced to turn MG litte more = no more MG covering each other. With S-mines on the flank I can compelty forget about it and focus in the middle of the engagement.
And the mortar is amazing when enemy is blobbing so hard. One good shell into clumbed blob 4-6kills.
Mobility of your solution, 0 ? ;D
What mobility you need? Blob is attacking, force it reatreat, push little further and repeat.
Crossing woods, first wave was on my side of the river (north spawn) around fuel point.
Second and third wave was at right VP.
Fourth wave was for ammo point.
Fifth wave was for the point near the right edge of the map.
It took me 15min to repel 5 waves and to move from my side of the river to the point with those cutted trees on the right. MP bleed from SU player was outstanding.
Between waves I could plant mines, make ambushes at stuff like that. And since he had Tank Hunter, I did not have to worry about 120s.