Sorry, that's too broad an area and too broad a time. This thread is about naming one or specific hotels for a specific date and the rate you're seeing on Marriott.com (without any special codes) for those hotels on those dates. And then hoping that someone can find a way to beat those.

There no way anyone can do that with the overly general info you've given, sorry.

For example, rates in some parts of the YYZ area may be naturally lower on weekend nights than weekday nights. So without knowing even what day of the week you'd be there, there's no way for someone to know how to find a third-party website that would be the rate at that hotel on that date. (And LNF requires doing that: Finding a third-party website that has a lower rate for that hotel on that night.)

Also, the best rate may be at a hotel that charges way more for parking than another hotel with a worse rate, and the parking cost may be greater than the difference between the two rates. But you have to figure that out for yourself.