I would be surprised if you can reliably find groups in Tower of Frozen Shadow.
Eastern Wastes is probably ok. Your best bet is likely going to be Crystal Caverns which is zoned to via the EW Rygorr Fortress. Although, it might take a few days before level 30s and low 40s sick of Kunark/Classic migrate on over. It's got a town (Froststone) where you can bank/sell, but can't bind at for whatever reason.
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