Fairly simple achievement. First off, make sure you activate the challenge first at the menu so you get credit for it. You might want to also activate the challenge for shutting down all the towers with no mistakes so you can kill two birds with one stone.
You can set the difficulty to Adventurer, equip your strongest bow in your deck, and equip unlimited poison arrows to make enemy encounters a breeze. The only parts where you may run into trouble are when you're shutting down the towers (the directions are simple to follow, however) and also the final objective when you
from what I can tell, there is no time limit when you're doing the last objective, but just remember that after you're done, you have to swing to safety to the middle platform to GET TO DA CHOPPA!