It's a very tough strategy to beat but sadly it is a legit strategy. The best counter to this is to try and build a lead early. Once you get it stay away from them. That way you don't feed them kills and more orbs. You also force thier hunters away from the safety of the bubbles. If possible you can try and sneak in a titan or two of your own to foh the bubbles down. My clan and I ran into this once on shores of time. The enemy team actually set this up on B. Which was a great spot for them. However we already had a lead. We stayed back until our own supers were charged. Used golden gun and foh to pop bubbles then the rest of our team sniped down thier team. We did win that match though it was a bit closer than we liked. It is possible to beat. But you need to have your own 6 man, a bit of luck and a solid plan. A group of randoms that don't communicate will get slaughtered every time by this though.