For a clean attempt, when Miser does "Sow" she spawns the seedlings. They all need to die before they germinate into lil Morbols. So lots of AoE needs to be done when they spawn. As far as the fruit, try to eat the fruit when you have at most 3 stacks of the barbs. I tanked it and survived with 4, but that's because I wasn't paying attention and immediately removed it.

That's pretty much it. Also avoid Bad Breath and any other red circle ability she has. My first time in there took us two tries, but the whm had done it already so be was coaching us on what to do. We one shooter everything except Miser. That was a 2 shot.