How do Discipline, Irelia Fervent, and Abandoned Hall stack?

If I cast Discipline on Irelia Fervent at Abandoned Hall, do I get +5 total (2 from Discipline, 1 from targeting Irelia, 1 from Abandoned Hall, 1 from Abandoned Hall choosing Irelia)? If Defy counters Discipline, do the Abandoned Hall and Irelia bonuses remain? Does Abandoned Hall count as choosing Irelia if she is the only unit there?