90 – I’m playing Rogue VS Taskmaster If I attack with the gambit ally and trigger his interrupt ability…

Photographic Reflexes is intended to prevent all damage Taskmaster would take from the attack, from the attack’s initiation to its conclusion. That means the damage Gambit (Rogue #3) would deal with his Interrupt would also be prevented, and would also be dealt to the identity. (Note that you are not required to resolve Gambit’s Interrupt when he attacks Taskmaster. But if you do, Gambit would deal 1 + 2 damage over the duration of the attack, so 3 damage would be prevented, and 3 damage would be dealt to Gambit’s controller Rogue.)