Are you completely sure? i heard that live teams are promoted from div V if there are bots in div IV, but I also heard that teams that are on position to demote will demote anyway (if they lost against bots, they deserve it). I might be mistaken though. Forcing them to stay wouldnt make any sense, because then everyone would go for last in first 2-3 seasons of game, get the best trainees.
You can easily make the playoffs if you wanted to (or don't want to, quite frankly). Um, are you purposefully going to tank and if so, what's the reason for it?
To clarify, although Canada does indeed have a division V available, it's very unlikely it will be needed for a long time. The reason it was created is because in the past other countries have had a problem arise where their lowest division filled up at some point during the season which prevented any new signups from those countries. So now in Canada and many other countries a precautionary measure was taken to avoid that problem by adding another division... just in case.As I write this there are only 334 active teams in division IV. Div IV has the capacity to hold 1024 teams. So unless the amount of Canadian users triple from now until the end of the season division V will be vacant once again next season. There will be no division IV teams that relegate to division V.