Don’t bother making them. They cost too much gold and barely ever come in handy.
It’s tip of the day
I’m not a pro or anything, but from all I see online or on the multiplayer games that I play, I can say grenadier-type units in general are really weak.
One of the reasons why I hate that Russia has them as a royal guard. ¬¬
They are just way too expensive to be justified, they take up more space, they are slow, vulnerable to anything melee and even countered as a musketeer too by light infantry and artillery.
They need plenty-o-cards and upgrades to make them usefull.
There are just better units to make, every time, if you want siege, just go heavy infantry or artillery instead.