Citadel 1 attempt is stupid

I pathed like 100 maps to find these damn citadels and game lags for a second during fight and I die to some 1 shot mechanic, this is crazy let us repeat the citadels or something, I just died to lag against geonor when he was at 1% hp now I need to do what another 150 maps to find another one? this is crazy I understand the boss mechanics but regardless 1 second of lag in these fights is enough to 1 shot you... I have 4k hp 75% all res 75% chaos res 74% block 80% phys dr this seems nuts to me. Give us more chances at citadels and hard to find end game content!!!!!!!!!!!!!!!!!!