The Bundesliga teams are very strong. The performance of the second Bundesliga teams is not regular. If Schalke wants to play well in the first Bundesliga then they need to improve their performance. They have to improve their defense. At the same time the team must have at least one experienced striker. Otherwise, Schalke will not be able to survive in the Bundesliga
Schalke and Bremen just got relegated last year from the Bundesliga. I think both have enough people in their team with Bunsesliga experience who will enable them surviving the Bundesliga season next year. Of course they will need some new players, but they will also have much more possibilities financially in the Bundesliga.
All games from the last play day will be in parallel on Sunday. I am looking forward to the Hamburg and Darmstadt games (pretty much everything else is decided anyway).