Help with Carino 2 Ice Lance

Hi there, I'm wondering if anyone could please help me with my build. I'm using Marcus Nordstrom's tanky ice lance build: https://www.youtube.com/watch?v=kylZklhKEbg jVZrIXj4EfCJGwAAAAAARw==

I am f2p and here is mine: Le8EYZFGEfCg8QAAAAAADA== I wanted to be tanky and have an easier time with ss20, but I basically have to play my character as a melee character.

I am using Malleable as an aura support spell to squeeze out as much damage as possible (as well as passing bomb back and forth with 1 sec left). I 3 starred all other bosses but I have to sweat so hard to kill ss20 in time even with execute.

I can't even use Defensive Buffer like Marcus does and have to go with Mana Boil for more damage. Any help would be so appreciated -- I invested a ton into this character. I'm disappointed that this isn't working like I hoped. If I basically need to rebuild half my character, I'll just quit til next season.