How to get the Exalted Reputation Achievement (Solo)

The primary method I used to get this achievement was farming Depths: Tower of Trials. Personally, I farmed Tower of Trials I, as I found it has the easiest second boss. Per run, the maximum number of marks you can get is 12.

• 1 x Stage 1
  
• 1 x Stage 2
  
• 2 x Stage 3 [Boss - Butterfly of Derilium]
  
• 2 x Stage 4
  
• 2 x Stage 5
  
• 4 x Stage 6 [Boss - Slumbering Wanderer (Successor of the Claw)]

The second boss is rather difficult at first, but after enough attempts, I was defeating it nearly every time. Trick is patience, and play reactively; don't dodge for no reason. Just farming it on my own, I was able to get the 400 marks, and hence the achievement, in no time. It should take perhaps around 2 hours to farm 100 marks; so if you split it up and farm 100/day, it's not so bad. Cancer achievement, but not impossible.

For help with any other achievements, feel free to comment.