I am trying to work towards being able to consistently do Mortem Rex raids. I have done the Thyla strat in the past with my lvl 15 thyla but it is very unreliable. What is the best low-level/easy to get guy for raids? The two lowest guys I have seen are lvl 16 poukadei and lvl 20ish tryostronix. Of these two which should I go for or is there a different guy I should pursue?