I did. (okay a bit different than the one due lack of cards)
Problem Nr. 1: You may not get to summon a Knight(or even King) at the start of the match = 80% lose
Problem Nr. 2: If you have fewer cards than the AI, it will let you draw cards with DW leading to a Deckout lose
Problem Nr. 3: Set cards will likely be destroyed instead of battled. While this is no problem for the exodia cards, for
That's sad. The OJama decks are for the Necross Missions only.
When it isn't to late for you: Duel Floor 27 Djinn. He can have max 2100 dark ATK(so if you use 1700+ dark or 2200 beater your are safe to 'farm'). When you beaten him often enough, the DD will come and give you 4k LP when you defeat them. That way you can heal yourself back to 4k w/o potions.
Cyber Stein Life Cost 0 did a few missions for me(40 boss mission <=6 turn win) or the spell(+trap) missions. Even against those pesky Archfiends it was useable(because they couldn't do 🔥 against 2 BEUD or 1 BEUD+Ojama King lockdown. Now I need RIP...