Aeroplan is at most a short-term solution.

It's been announced that come 2020, Aeropan will sever its ties with Air Canada, and it's unclear if Aeroplan will have any usefulness for FTers after that happens. Air Canada has said it will start its own program at that point, but he details of that have not been announced, it's not been started yet, and whether you'll be able to move Aeroplan poitns to that new Air Canada program has not been explained yet AFAIK.

And thus I'd not recommend transferring to Aeroplan unless you're absolutely sure you'll redeem every last mile before that disconnection from Air Canada happens in 2020.

Meanwhile, on the Chase side, you don't have to choose between Ink and Freedom Unlimited. You can get both (one at a time), assuming you haven't been applying for hardly any personal cards in the past 2 years, and you can combine the points you earn from both cards into one Ultimate Rewards account.