PSA: When playing against Darius...
Don't let him get 5 stacks on you. I've played so many games where my opposing lamer just let me get 5 stacks on them, and just outright murder them. Darius is weak to in-and-out fighting, short trades quick heavy bursts, and a lot of poke. DO NOT GO INTO AN EXTENDED TRADE WITH HIM. Unless you're a fed trynd, jax, or fiora you will die 100% of the time, 100% of the time.
If you need to, just focus on farming, because, unless your ahead 2+ kills and 25-40cs, the Darius will kill you.