Also reading the codex thoroughly for the mythics on the Mythics section of the Dictionary part of the codex .
Common great mythics: Brutal Chest Mythic to make deadly strike 3× the crit dmg instead of 2×, Vanish offhand mythic for survivability if you can implement it (rogue best for it though due to hero point), Resource mythics like Energy or Fury , Cosmic orb MH mythic and even head mythics where possible such as Harmony, or Desperation and definitely Sanctuary Mythic for Amulet to revive after death once every 30 seconds.