A good tip for bard or machinist is to know when to turn WM or GB on or off in fights. This may take studying or experiencing some fights a few times. For instance, in Alexander 1 normal, you can leave WM or GB on until Oppressor 0.5's adds come out. At that point I will typically turn it off so i can damage it on the way to the laser. I will then turn it back on right after it's dead. This also ensure I get quick hits on the add before it can run to a healer.