Although the meta of the game can change after any major update, these are the current meta tanks in WoT Blitz in every category.
Anime Tank Blitz: Warbound Legends for Nintendo Switch - Nintendo Official Site
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World of Tanks Blitz best tanks in each category
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Czechoslovakian Tanks
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World of Tanks Blitz best tanks in each category
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Tier 5 and Tier 6 Tech Tree tanks - Tier List (my opinion). Criticism welcome : r/WorldOfTanksBlitz