1 - its the end game biome , most be hard and not repeat something from other biome , you most be some tactical there with wolf set/padded set, for the flax , just run into the village with deer boss power and go away , but most be planted in that biome too remember
For black metal its more easy to grind that iron IMO , and solo players have the best handicap because in MP mobs have more damage and health
Now finewood trees drops seeds , so can be planted in a secure place

2 - try to take a high place until the event ends , now its more hard i know , only i can say is the use a frostner and bonemass power ready if u can do the first

3- more preparation and know when u have to run away , just tank everything dont work now , take the deer or bonemass power in hand for critical moments , and tasty me/ads to stamina recovery , it has not cooldown

4 - be smart , build more fermenters if u dont like wait that much , and its not expensive lol , even if changed the cost ( before 5 bronze , 10 recine and 30 fine wood ) if that new cost dont change that much , only have to mine more bronze that will not kill you

7 - if powers has less cooldown will be maybe too overpower , its fine to me , 5 minues its good time to do every that powers needs
And for potions , if have problems with stamina only use tasty me/ads