Renaissance Optional Rules: Best 4 historical accuracy

[BigDuke66]

Go for Manual Defensive Fire. I know it's a hassle to play in phases but that is the only way musketry makes a difference.
AFAIk the game is not different from that of the Napoleonic series and here the casualties compared to the size of the unit matters a lot if a moral check is triggered or not.
The trouble playing without MDF is that the fire is only conducted at 50% and only randomly triggered, so a unit may walk up to you without being fired on, what is pretty silly. But even if it gets fire the trigger test is done instantly and with just 50% fire the casualties are so low that triggering a moral test is unlikely.

That is why the latest release of the Napoleonic series switched to phase as standard but even then introduced some new rules to make this un-challenged walk up to a defensive line by an attacker more demanding by adding the possibility of disruption to the attacker.