Scarab King issue. Hard lvl 100

Hey guys, Im so stuck here its silly. I tried every build on youtube but it just dosent work for me. Im playing Vergis, Coldhearts, Mithrala but the guy hammers me like im nothing and I cannot for the love of me, remove his shield.

But when I watch scarab videos they ruin that shield like it is nothing.

I use two cold hearts, they use their Heartseeker and nothing happens to the shield... he just loose some turn meter and then hammers me into oblivion. HOW IN THE WORLD can I remove that nasty shield?

What am I doing wrong?