Hits all three

Fort: (2d6+12)[2][3](17) Poison Damage (ongoing 5)
Reflex: (2d6+12)[4][6](22) Fire damage (ongoing 5)
Will: Dazed.

Query, using Orb of imposition, do I add it to all three or just one? I was thinking this after the last match, but it wasn't a contention since he never rolled in the 'zone', either failing to roll 12 or rolling 16.