need help with irontwins
so recently iv been trying to do stage 11 and 12 of iron twins, and wow iv hit a brick wall completely, iv tried virtually every champion composition i own and nothing works, iv tried slow fights and long fights and honestly im confused by this boss heavily as his mechanics are honestly broken, iv seen fights where iv managed to keep example my scyl from receiving any ironbrand debuffs for a sold 3-4 mins, then the boss just 1 hits her? and other members of my team who have stacks of ironbrand and are half dead dont die. iv had fights where iv survived 10 mins, iv had fights where he destroys my team in 2-3 mins.
can someone break this down into the simplest form or me
been trying to use these champions to beat it :
nia
rector drath
scyl
fahrakin
akemtum
rotos
adriel
death knight
klodd beastfeeder
hotatsu
uugo
average defence on team is around 3k and average hp around 45-55k , resistance is not on par but not seeing how it helps if my scyl gets 1 hit without any stacks.any help is appreciated