Msketeer & Grenadier combo
cards needed:
musketeer/grenadier combat,
improved grenades,
advanced arsenal.
other cards if u want to use:
musketeer/grenadier damage
cavalry combat
yeomen
As you know brits have limited infantry available. So this musket and gren combo is good against inf/archer/cav units.
From your 50 men have 25-30 recoats,10-15 grens; 10 life guards would be good idea for for skirm ambush or cans.
Ok now these grens are good at softening enemy ranks like inf because they have 4 radius damage. Redcoats can be used to kill off the softened inf etc. And cav can go in melee or flank sirms if there is any.
Final:
I chose the brits for this because they have imroved grenades and other grenade cards, which makes them one of the best grens in the game. Also they have the redcoats(the improved muskets) and the life guard hussars. This makes it a good royal guard army.
thanks