Still relatively new to the world of churn, wondering if anyone can point me in the right direction? Goal is to generate miles for Aeroplan Mini-RTW travel and/or to upgrade Cathay tickets on transpac flights.

Currently have the following (all Canadian).

- Amex Plat (used whenever possible) - got in Nov 2013
- Amex Gold (not used) - Got in April 2014
- TD Visa Infinite First Class (daily use - for places that don't take Amex) - had for years.

Income is about $80K, credit is in good shape.

Current plans are:

- Keep the Amex Plat until just before it renews, as it earns MR faster than the Gold based on my spending patterns.

- Drop the Amex Gold so I can churn it in December

- Transition the TD Infinite to the TD Aeroplan Infinite.

Questions:

- Am I better off dropping the Plat now, and keeping the Gold? Not sure if I'd churn the Plat based on the high fees and disappearing Cathay status, but if I renewed in December, use the 2014 and 2015 travel credits, it's basically buying 60,000 MR and hotel status for $299.

- Any reason not to switch TD cards?

- If I cancel either Amex card now, can I even churn it in December?

- Any other products I'm overlooking?

Thanks folks!