Your best bet if you're going for experience is to put on physical gear and life drain protection necklaces/rings/arrow slots and head to Flimsey Lost Souls in POH desert. This will be by far your best experience an hour for your level solo, it is also profitable but if you don't care for profit that much you can just barely loot and focus on killing as fast as possible. You can pull more than 7kk raw there if you hunt it well enough and depending how much you stop to loot. Also this is the best place to hunt with preys since you can put them on experience bonus and it's mainly 1 creature in the spawn. Go there with green stamina and exp prey on Flimsey Lost Soul and pop an exp boost and you'll level extremely quick!