Greeting Waveboy, this is the first domination with electrocute build in last 2 days i saw allot of guides with Dark Harvest only, and you have few mistakes in guide but it is still good and you should upgrade it a bit, by the way dont forget to update it, dont stop playing katarina.

Hello!
the guide is decent so far but i wanted to correct one thing you had, is an item cooldown reduction rune which isn't so bad but not the best for , i'd prefer playing to make triumph's healing or Gunblade's healing alot stronger so more sustain
you also have repeated some things in the "runes" chapter *not sure if you noticed*
anyways, good luck with your guide and i wish you the best!