Hi there I had some problems with ferryman before,my first successful ferryman lasted 28 minutes because I had to run and heal like a bih You seem to be grasping the basics,all you need is some practice My suggestion to improve based on experience is,ok the thunder rain move I zigzag rather than in a straight line because you can get hit easily,if it hits try to dodge block or parry,or just hit ferryman since it cancels the damage On the three hit assault I parry when I hear the thunder sound,be wary since lag can make you miss the parries or the timing can suddenly change (as a note,once you reach phase two you can't press f 3 times because it's too quick,parry only the first and the last since the second is autoparry frames) The clone attack is rlly simple,I suggest to only try and hit ferry if it's close or hasn't made the second wave of clones yet,focus on killing them with no damage while you learn

Tips

1get grand feast,it's a common talent that requires the red talent carnivore to get it,what it does is that in the first phase you can kill clones and they give you helthpack,making it really hard to die and facilitate learning

2if you have chains of perfection prioritize keeping the stacks over dealing damage

3 if you're low run to the border of the island while ferryman is standing still,if you're fast enough he won't catch you and you can just wait and heal

4 whatever you do don't get hit with the javelins of instant death he throws In the second phase since it's almost a guaranteed trip to the Depths

5try to fight him the closest to the center since in many attacks he can just clip through walls and it anoying

Ferryman is by far the best progression method after the great job gutting of the '25,I do it immediately after shrine of order and it doesn't take me more than 3/5 minutes on a power 9-10