Level 1-35 (World Tier 2)

• Start the seasonal Questline and progress untill you can gain Iron Wolves Reputation from the Helltide.
• Start running Helltides. These are active every hour for 55 minutes, use the 5 minute break to upgrade your gear and salvage loot.
• Open as many Tortured Gift of Mysteries, these give a nice chunk of experience on opening.
• Finish your Class Quest and get the Aspects you need for your build. While running Helltides, complete Events to obtain
  Murmuring Obols
  . Don't gamble on World Tier II, as the Legendary drop rate is very low from the Occultist.
• At level 35, complete the first Capstone Dungeon.

Level 36-60 (World Tier 3)

• Keep running Helltides until level 60.
• Temper your gear and stack Fire Resistance.
• Complete the second Capstone Dungeon.

Level 60+ (World Tier 4)

• Keep running Helltides until level 70.
• Start running Nightmare Dungeons to level-up your Paragon Glyphs.
• After completen a T46 Nightmare Dungeon, you unlock the Pit of Artificers.
• Gather Masterworking materials from the Pit and maximize your gear.