Where should I go first after beating renalla and getting to Altus Plateau?

I beat renalla pretty easily yesterday, I’m level 65 running a dexterity mainly build and am wondering who I should fight or where I should go next. I tried fighting rykard, but his second phase is giving me a lot of trouble. I got to the site of grace right before radahn, so that’s an option as well. But both these bosses seem pretty intimidating right now. Should I just progress the story?