For this achievement you must complete all regular duels & reverse duels to unlock all Duelist Challenges.
The quickest way I have found is using an Exodia Burn deck it usually wins turn one (well it has for me for the entire reverse GX and 5d's Arc) Also if you win Rock, Paper, Scissors pick to go 2nd as you get a draw phase giving you an extra card,
I used the deck by Bewch on steam and it is amazing he says where you find the cards and how to use them if you are unfamiliar with some of them.https://steamcommunity.com/sharedfiles/filedetails/?id=87716...
Here is a clip of me using this deck and this is the normal outcome, It is my frst turn in the duel 2nd overall as the AI went first. (skip to 0.43)
Sorry, this Game Clip has been removed
Using this deck will shave Hours off the grind time.