I finally did it! The last phase so phenomenal

After learning how to wall bang, then hunt Frost Barioth to get better equipment. Finally beat him on first try after failing like 12 times. The hunt getting easier after i cut his tail and broke one of his arm. After that, last phase do or die, only had 3 mega potions and one lifepowder+

Also equipped my palico with paralysis weapon did a great job for the last phase. And thank you guys for the suggestions before.