1)Spiral swords - Break the ice. Charge them and trick close to the heads. Use beowulff upper cut in close range which will make spiral swords to break ice for short seconds.
2)Judgement cuts - Once ice is broken - Judgement cut from a long range. Keep judgement cuts short to dodge any following attacks from the beast.While dodging attacks - charge judgement cut and release again.Same can be performed with force-edge.
Best way is to have charged attacks from long range such as spiral swords, Judgement cuts.
Another strat would be to use spiral swords on its legs that will bring beast down for a couple of seconds where it will be open for attacks. Spiral sword again and go for the head once it is down.
VMD Cerebrus
Spam style button for teleports whenever possible as beast can reach anywhere and u can stay close with style button.