I am based out of YYZ and used to travel frequently on ET (*G) for work. I changed my job and I no longer travel as much for work. So I wanted to switch to earning Aeroplan points but I've a couple of questions:

1. How can I earn Aeroplan and still use the *G status on AC flights? (I would like to use priority check-in, extra baggage and lounge. Don't have any hopes for upgrades :/. )
2. I have limited use of Shebamiles, so how do I best utilize these points for my non-ET travels?

Thanks for your time!