okay so I think this is right.
so if Chelsea win Conference League and don't finish in Top 5 but Come 6th, 7th or 8th place - 9th place gets Conference League. (as long as Palace don't win the FA Cup)
'By rights, the winners of the Conference League get a place in the Europa League. If Chelsea lift the trophy and finish inside the top five, there will be no change to the allocation. If Chelsea win the Conference League and finish sixth, the Premier League gets an extra team in the Europa League, and nine in Europe'
so if Chelsea win Conference League and don't finish in Top 5 but Come 6th, 7th or 8th place - 9th place gets Conference League. (as long as Palace don't win the FA Cup)
'By rights, the winners of the Conference League get a place in the Europa League. If Chelsea lift the trophy and finish inside the top five, there will be no change to the allocation. If Chelsea win the Conference League and finish sixth, the Premier League gets an extra team in the Europa League, and nine in Europe'