I need help on Maliketh

I'm doing my first rl1 run and I have a hard time with Maliketh. Is there a strat that I can use to defeat him or just I need git gud? Any advice appreciated.

Update: I just beat him, I used ice spear like most of the people suggested and it was so satisfying to break his poise and riposte and finish him. Thanks everyone for all advices!