I used similar teams in previous times Trials of Decimation happened:
Proteus is definitely a lot of what made those teams work well, but having the Boldtusk/Kiril combo definitely makes this one doable.
I’d just suggest bringing along some heavier attack items in case you get stuck and need to bomb your way to victory. Otherwise mana and healing can tide you over between times Kiril or Boldtusk are ready to fire.