You don’t need to vote Conservative or Liberal. Just vote for NDP.

This is wrong! Unless you are OK with letting the country become a reactionary vassal state of the US empire, we need to vote strategically. First check whether your riding needs strategic voting (or via smartvoting.ca or www.strategicvoting.ca, and you can cross check with your preferred polling reports – e.g. 338canada.com). If it does not, only then vote for whoever without throwing your vote away.

We need a progressive coalition.

I mean with how hard conservatives are getting trounced (see https://smartvoting.ca/) it seems voting your conscience is viable because a liberal majority is guaranteed anyway.

It always depends where you live, splitting the vote in certain regions might lead to a Liberal minority.