I owned two doldren players nonstop. he did get me a few times, but i started focusing on him. watching out for where he hides behind, looking for his vulnerable body while he goes astral. and waiting around corners then another where i took advantage of him going after other players on my team. i quickly run towards him then grappled him. or as before, shot my gun towards him to drop him to zero then finish him. there is strong doldrens, but for me it's about staying on the move and looking all around you. as well look for his vulnerable body, he's most likely in astral form looking to attack. i always look for this and quickly grapple. it's also about being just as patient as him, wait for him to strike in the wrong place and wrong time then punish it lol.