Hey, I'm EpilepticRabbit from EUW and I'm in plat 4 and I'v enjoyed playing Darius to much success as he is fun and easy to play. This won't be a long guide and more of a cheat guide to Darius, for the pre game checks!

+ Start with Crippling Strike to slow the camps attack speed, it also makes it easy to clear since it loses 1 sec cd for every Hemorrhage stack the target has.
+ You can almost permaslow someone with your Crippling Strike late game, in the jungle try to do 2 auto attacks and then reset the auto with w. Q DOES NOT interrupt auto attacks like Ravenous Hydra however it does stop movement.
+ Flash + Apprehend is very powerful, you can pull someone beyond the visual range of your e, so always be ready.
+ 1v1 combo is aa-q-aa-w-aa-e-r if they run. Burst combo is e-aa-q-w-r. That's 4 stacks. so pretty good in a short amount of time.

- These are good because they reduce CC so you can get to targets quicker as you don't have any gap closers but you do gain 5% movespeed for every target champion that has a stack of your passive. Also you gain invaluable MR.

- Since you do not get cinderhulk you get this to build into Sunfire Aegis, you can sit on this since it has the burn already and makes clearing easy. It is also magic damage so it is harder to itemise against you plus it is more DOT.

- This gives you the eztra true damage burn and you can keep proccing it with your w and auto attacks, then you have vision on the to pull them back or dunk them. In 1v1 situations it is great since it makes you take reduced damage. The stats are amazing. AD, ARPEN, CD are all good.