I am still using the last (ancient) version of Azureus (Vuze) because it has great plugins. I have the plugin to allow it to use the Mainline DHT, and I use the i2p plugin too (because the default i2p torrent UI is bad). Azureus is (was) the only client that can download/seed a torrent on clearnet and i2p at the same time.
Having said that, I didn't know that BiglyBT has i2p support, so I need to check that out.