Your shadow shot can't get inside a bubble layer, think about 6 bubbles back to back to back your shadowshot literally wouldn't have an angle, so it would be useless
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Your forgetting the fact that any sniper with wepons is a one shot
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Also defenders have suppresser nades which cool down quicker then shadowshot and do the same thing! Just have some defenders step back and chuck a suppresser after poping a bubble. Now the enemy can't use there abilities, have fire raining down and those bubbles are just getting creeping up on them slowly. then a striker just walks of the bubbles to the pile of rubble they're hiding behind and slams the poor basterd. It's not a battle it's an extermination...