I would suggest the tribe you're the most active with your curation and your engagement.
True that LEO is launching a liquidity pool soon and an airdrop on Leo Power (staked LEO) but if you love curating on CTP then buy some CTP.
You could also try to maximise your Hive curation by delegating your Hive to a second account dedicated to Hive curation and setting up an autovoter in a smart way (frontrunning some whales or big curation feeds) . You might get better returns than curating your preferred tribe manually :)
Thank you, I will look into the autovoter thing.