I think with 8 in the finale, i'm more inclined to think that this week, another one of 6 remaining will be voted out, forming our Final 5.
Here's how i think it'll go -
NOW: 4RI, 6 in game
This week: 1 eliminated from RI leaving three left, 5 left in game after TC, 1 more join RI after voted off making it 4 person on RI
Next week: 1 eliminated from RI, leaving three left, 4 in game after TC, 1 more join RI after voted off making it 4 person on RI.
FINALE: Duel between the 4 and 2 will re-enter the game to form the FINAL SIX. That explains why they're not making 1 to 1 battles anymore but increasing the amount of people so that they will have enough people on RI at the end of the day to let TWO people re-enter the game.
And in the finale we will have 3 ICs and our final three.