How to Avoid Damage in Gloomhaven

I haven’t written anything about Gloomhaven yet, and it only seems fair, since these days I play Gloomhaven ten times for each time I play any other game. I play with my boyfriend, and we frequently lament what we’re giving up in order to make time for this monster of a game (Social lives. Meals. Sleep. Sanity?). We’ve been playing Gloomhaven without a tank lately, so this topic has been on my mind.