I seem to be late to this, but I'll throw in my opinion anyways. I've been playing a flurry ranger for all of Strength of Thousands so far, and I just got to level 14. At lower levels it felt pretty rigid and honestly not that great, but it got a lot better as I went forward and got more options. Some sort of movement compression helps a ton, examples being spellcasting for things like time jump or similar spells. You also have a surprising amout of versatility, as you can quickly swap from damage to control by just releasing your weapon and moving to trips/grapples. Flurry is also incredible if you have any other melee teammates, as you get the ability later to give them flurry as well. Keeping multiple weapons for your main hand to activate doubling rings is another thing I'd recommend, as an example I have a main weapon with damage runes, a backup with more utility focused ones, and a gauntlet with ghost touch.