If only more maps allowed flanking maneuvers...
That short word "if".
Fnank is not an option in many situations.
What i think i will try on urban maps
4 cons 2 mortars opening
1. In case of enemy having 2 mgs I will have 2 more infantry squads and to cap points in the opening. (if 1 mg i will flank it)
2. after that it will be like 4 cons 2 mortars vs 4 greens 2 mgs. And try hard to get vet 1 to any mortar.
3. After mortar gets vet 1. I will pound him using flares (which he dont have as far as i know) probably forcing to attack. And he cannot attack with his mgs he will attacj with infantry outside of mg range and die.