Getting rid of most of the arrows would be a good start, I imagine most contradict your game mentality and are very tiring for the players.
You have a good selection of players (positions) so why stick to one formation.
A army that uses the same tactics for each battle will be beaten 4-1-2-1-2 narrow diamond has no flank cover, also a 3-1-2-2W-2 V formation will cause it no end of trouble, matching it's MF in the centre and overpowering it in attack.
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