So if I were to be fighting tiamat, and I true polymorphed into another tiamat, would I be able to use fire breath against her, or would we need to do melee combat only? And would our claws be able to do anything to each other or would we have a stalemate?
Oh, well thanks for clarifying that. In that case, assuming both are accompanied by a party of a level 20 rogue with fudged stats and a ton of proficiencies and expertises, a level 20 druid with normal stats, and a level 20 barbarian, who would you give a better shot at defeating tiamat?: