No deal with the Tories will have any meaningful impact on the DUP base.
There's no way in hell SF are going to take their seats. Remains to be seen how the SDLP would view a Corbyn administration. There's still the potential of 2 Alliance seats- Belfast East and (less likely) Belfast South. They could be lumped in with the LibDems.
Of course no-one should rule out Farron going in with the Conservatives again.