Summon Unhappy Girl, or Rai-Mei if you don't have unhappy girl, and stall until you can perform gravekeeper's vassal and union attack combo. Set a Rai-Mei when you set an Enchanted Javelin to raise your LP to ensure Tea won't attack the unhappy girl while also thinning your deck. Summon BEUD when you can before the last turn and leave 1 monster slot open for vassal.
Example deck (No Union Attack)
Works similarly to the method above, except the finisher is Cu Chulainn. Use the Rai-Mei to thin out your deck and summon BEWD early in the duel. Since Cu Chulainn's damage is only going to be around 5000, make sure to destroy her solemn wishes as early as you can, otherwise just deal the 5000 damage and get her to deck out.
When the duel starts summon gate guardian right away, then stall the duel until you fusion summon blue eyes ultimate dragon and get piranha army, both of the gift of martyr and secret pass to the treasures. Once you've done all that on the last turn summon piranha army, use secret pass to the treasures and use both gift of the martyr on piranha army for a direct attack of 18k.
If you have glossy or prismatic cards you could probably get 8k duel assessment points. Jar of greed, shard of greed and white elephants gift are used to get cards quickly. You can swap alligators sword for any other non effect monster and blue eyes ultimate dragon can be swapped for master of oz.
For Tea you MUST have blue eyes ultimate dragon or master of oz as she has 2 traps cards that give her 500 life points every card she draws but for Yugi, Odion, Weevil and Rex you don't need a fusion monster, you only need gate guardian which you get at the beginning.
You could use something like this for Yugi, Odion, Weevil and Rex as they don't have cards that gives them life points but for Tea you must use something like the deck above as she gains life points. That max I've seen her have is 14k.
Yoda9632 7days ago
In 4 battles I pulled
1-sages stone (shiny)
1-supremacy berry (shiny)
Don't worry, bro! You might be lucky enough to farm her cards less than 3 months. I wish Konami would add a feature that allows us to trade our extra cards with our friends on Duel Links. This would be very much helpful!