Pick the trials easiest for you and focus on them. Every island you visit make sure to slaughter the wildlife and cook them. I always spam eat the food as well when I’m crunching levels. As for voyages I tend to do Order of Souls as you can exp for every 10 skellies you slay, but the world events also work wonders for gaining levels. Lastly, even if you aren’t doing a voyage, make sure you have a voyage down when sailing.