Asymmetrical IGs

By So Crates, in X-Wing Squad Lists

In the space of Defenders, Dengaroo, and Mindlink lists of various types, is anyone having good success against those with double IGs? What do you think of asymmetrical IGs, with one designed to push forward while the other hangs back:

IG-88B (36)

Push the Limit (3)
Fire-Control System (2)
Heavy Laser Cannon (7)
Inertial Dampeners (1)
Autothrusters (2)
IG-2000 (0)
IG-88C (36)
Push the Limit (3)
Advanced Sensors (3)
"Mangler" Cannon (4)
Black Market Slicer Tools (1)
Autothrusters (2)
IG-2000 (0)
Total: 100

Thanks for your thoughts!