Ideally you use it to get profitable trades and protect things against removal
Just like the other duels, use Fighting Pokemon
Batterskull Courser only gives one life per land made, usually just one per turn (although it does mitigate sac lands well as well as having great synergy with the shuffle!) and not always even that
Not the best disruption when you have cards like Imposter Oaks Revenge and not the best hand refresher when you have cards like Professor Oak
There isnt much need to replace basics with cards like this in Commander, but if the secondary effect is something your deck actually cares about, you might take a second look
Some are pretty decent, like Revitalizing Repast, while others seem outright cracked, like Strength of the Harvest