Queen or Kamath

Who to scarifice, 10* queen or kamath. I got 9* kroo, 10* queen, 10* Vesa, 10* kamath, 10* heartwatcher and e3 valentino as my line up. I don't know who to e3 first yet. Might be dasmoge, valk or heartwatcher (depending on which copy I will get). Max ranger, mage and priest tech. Working on assassin tech now. Thank you in advance. :D