Martin McGuinness would be First Minister in the event of Sinn Féin being the largest party in the Assembly. I just don't see the TUV getting the same level of support in an Assembly or Westminster election, a lot of the vote had to do with Allister himself being an ex-MEP and having experience in Brussels. Plus all three sides definitely wouldn't contend constituencies in a first past the post election that could return a nationalist if the unionist vote split.