As for Tea, she isn't very hard, but she likes to manipulate her monsters' power levels by using hoshingen,winged trumpeter, and silver bow and arrow. She also likes to use Soul of the pure.
Tea's map isnt important, but there are a few mountains, a few meadows, and the rest is all normal.
To defeat her, i have only one strategy, change the map to your terrain(s), and with your field bonuses, you should at least have a monster with 4000 or higher attack after being powered up, and you can double move.
Tea's Deck
1- Ansatsu 2- Amazon Of The Sea 3- Beautiful Beast Trainer 4- Blocker 5- Creature Swap 6- Dark Prisoner 7- Deepsea Shark 8- Fairy Meteor Crush 9- Fire Kraken 10- Garoozis 11- Gate Keeper 12- Giant Turtle Who Feeds On Flames 13- Gaurdian Of The Throne Room 14- Kanan The Sowrdsmistress 15- Leogun 16- Lord Of The Lamp 17- Mabarrel 18- Madjinn Gunn 19- Misairezame 20- Monster Egg 21- Mysterios Puppeteer 22- Mystery Hand 23- Neo The Magic Swordsman 24- Pale Beast 25- Patrician Of Darkness 26- Resurection Of Chakra 27- Rude Kaiser 28- Sleeping Lion 29- Sorcerer Of The Doomed 30- Spike Clubber 31- The Drdek 32- The Illusory Gentleman 33- Togex 34- Two-Mouth Darkruler 35- Uraby 36- Versago The Destroyer 37- Versago The Destroyer 39- Warrior Of Tradition 40- Wicked Mirror