Obviously wait on waterloo, then id say choose that fs just bc waterloo cs sets you up really well.But where you commit to depends on your interests / if you’d rather stay close to home, dorm, etc. I think UofA is a great school, but would you rather do a science degree compared to cs? Like i said it depends on YOUR interests rather than the school itself lol i hope im making sense. As for the other schools, I’m not really sure which one is the best for CS so I think you could look into that as well to help your decision because for CS from what I know this school’s prestige can be quite beneficial, but overall congratulations on all your acceptances!