I've said this before and I will say it again.
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Increase the amount of time mollies last for half a second, and half the damage done. This way you kill off postplant lineups but not corner clearing.
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Switch the Signature, The wall is buyable , the smoke orb is free. About 300 credits. This way Viper effectiveness in splitting the map is compromised.
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Wall consumes more gas than the orb, you must be effective with gas usage.