How do I beat this MF????

I’ve been having little problems so far - some bosses took me a little longer (the bishop for example) but mostly it’s been pretty chill. But this guy. What is going on in his 2nd phase???? I had to rage quit twice over him. Right now I‘m lvl 65 with about 30 in motivity and using the Pipe wrench with the krat police baton handle +6. problem is that this weapon has very little range and in the second phase this mf keeps running away. Please help!

I’ve been having little problems so far - some bosses took me a little longer (the bishop for example) but mostly it’s been pretty chill. But this guy. What is going on in his 2nd phase???? I had to rage quit twice over him. Right now I‘m lvl 65 with about 30 in motivity and using the Pipe wrench with the krat police baton handle +6. problem is that this weapon has very little range and in the second phase this mf keeps running away. Please help!