Guild of Guardians - Kriez versus "Dorro, Oxellus, Aquiris, Atticus and Thorit"

I can't passed the CHALLENGE MODE... Lol...
🤔🤔🤔 Mostly of my Gears are still on T4... Ahaha...
I want to farm T6 a little faster so I am eager to clear the challenge mode (1, 2 & 3) in the Requiem if possible but I GUESS i have to deal with this over and over again...
Kriez and Corvus combo is really a pain in the @$$ for me... Ahaha