I had 0 issues with feelers, i just didnt use mounting at all on normal phase and try to pop the dmg bonus from the virus while focusing on gore's tail until i cut it off (it was the only item that i was farming due to it having 70% droprate), when enraged you use mounting, hit like a maniac (in my case used blade from SA and X-A-X-A to no end or followed with X+A) then set up a pitfall trap so i could get to his head faster and bingo