I would play TIE in your match leading up to the undefeated team, and then play CT against the undefeated team. Unless you think you are better than their team in which case just play normal. The reason I am suggesting this is that having HCA in the finals can be a huge advantage, and so try and make sure of the win against them. And you will still have plenty of time before playoffs to build your enthusiasm back up. Also if you finish unbeaten and happen to lose in the playoffs/finals then you might still promote via bot cleanup.