A Reddit user named tupiniquim published a tool for Quest Shaman. You simply add your deck code on a website and you will see if it’s worth or not to mutate a minion in your deck. If you want to see a picture bigger simply click on it.
You are playing Quest Rogue and you got mutate out of a random effect, you can use the tool too to see on what minion it’s the best. Sadly this tool doesn’t work for wild.
If you have tested the tool and want to give feedback, visit the Reddit post!