HI.
Am only a new(ish) player , but here are some thoughts and ideas...
A)Don't forget British and Comonwealth Shermans can fire smoke.
B) Most infantry lists I see run 4
HMG ,(Attached to combat platoons.)And 6 x 3" mortars or 4 X 4,2" mortars.For help with enemy massed infantry, and cheap HE and Smoke support.
C) I think an
AA section or Priority Typhoon is a good idea to counter enemy air attacks.
D) 6pdr
AT guns are great for supporting fast moving attacks .(Motor platoons.)But 17 pdr s seem to work better with normal infantry .Sniping enemy armour at range.
E )I am not too sure on artillery , But 8 x 25 pdrs might be a better choice than 4 x 25p pdrs and 4 x 5.5 ".(More options on area of effect, and fire density, and get 8 gun battery rules.)
F) Any armoured platoons under a bombardment uses its top armour value.(Normaly 1 or 2) .So 25pdr bombardments are quite effective as an anti tank element...
If I have got anything wrong I am sure more experianced players will correct me.