I can't do a high level hunt as far as I'm aware. I haven't unlocked at least 5 more monsters that I know about. I died to a Barroth 3 times in a row before I rage quit last night. I've never died to one before and I've been able to eat every single attack without being flattened in one go. But his head butt is enough to end me now.
How does defense work? Is it a % damage reduction or a flat cut off where each additional 2 points is a direct decrease in damage taken?
My farm only has two slots at the moment and makes 2 items per rotation (I don't know what actually triggers a rotation, but if it's a successful mission/investigation/bounty, then I'm way behind due to being stuck at the moment).
If canteen mats only come from the bounties, then I've been picking the wrong ones entirely.
Optional Quests, Critical/Limited bounties and Deliveries only. Farm is triggered by successful quest (not expedition). It eventually gets like 50 slots.
I am relatively certain that defense is a linear increase in damage reduction based on the defense #.
For Barroth you may not have been doing a lot of damage because he had the mud armor on. Watergrass or whatever you find around Wildspire for the slinger can wash off his mud armor and you can do more damage to it. I forget what he's weak to.
Secondly, you probably are not opting for the Chef's Choice meal at the canteen which will always bring you to +50 HP/+50 stamina. This is pretty critical because without it you're walking around at basically 2/3 of your health and stamina. This can make monsters kill you easier.