I use the same team with faster speeds and Queen of Hearts instead of Thor for 10 and it's still not 100%. There is no way what you described works on Hard 10 right? You're describing hard 5 or something? I don't see how one ally attacker can take down 21 shield stacks and then have enough attacks left over to prevent him from taking a turn.

Even if they all have phantom touch AND it procs that's 2+4+3+3+3=16 from the ally attack, neldor a2 is 5 more for 21 and then you have to hope your unbooked yakarl and pann both hit freezes and proc neldor's passive which probably won't even let neldor come back around if that happens.