I'm no expert, started about a month ago with rev. But I'm an old gamer and watched many tuts. So I decided to go full Berserker for high dmg. Mallyx/Shiro is the combo that works best for my play style in PVP. Cor/Dev/Inv or Cor/Dev/Ren if I want the ranged option. Keep in mind that you have to take the most of the 2 legends you pic. If you stick to one all the time, you're gonna feed only.