OK lets start with Darius builds that other people have made, they tend to lack damage and go a'bit over the top with Tank in them so yeah, i made a kinda hybrid of both in away so hope you enjoy this build and please Thumps up or Down if you didn't like that build are please tell me how to improve this because it is my first build! Enjoy:)

I tend to like more damage than tank build with Darius since you get the early game advantage since your ability's are aimed at damage so with the damage type of mysteries they suit/fit in with this build.

Getting boots early game helps you runs from near deaths and ganks helping you also to chase down enemies then getting Magic or Armor upgrade boots really depends on the champion you are facing so eg. if you played against Temmo you could get magic resistance to protect your self more from his ability's. If your up against Pantheon you would get Armor to protect your self form his damage output and his flying spears. The Brutilizer helps you dish out a'lot of damage early and penetrates Armor of the oppositions champion which also help with your ability's damage as well. Frozen Mallet is just for attack damage and health. Laster whisper is to penetrate anyone who is going Tanky and for doing tons of damage. Randuin's omen is for health and armor. MOM is for Damage and MR.

APPREHEND (E),CRIPPLING STRIKE (W),DECIMATE (Q),NOXIAN GUILLOTINE (R) i don't think i need to say anymore.

Pros Cons
Good damage Lacks CC
Can stay alive No form of escape
Great when fed
Is one of the best AD or Best
Great farming