Actually, besides from being used as fire extinguishers and occasionally used as boss freezers, Wave turrets are rarely used, which means that the offensive aspect of liquids (especially cryofluid, tar and slag) almost never gets used.
To overcome this, I suggest adding a higher tier Wave-like turret, the Tsunami. This turret will:
* Spawn 4×4 tiles
* Have a range that's about 2 times the range of the Wave turret
* Have a little more inaccuracy than the Wave turret
Now for the interesting part. When the target is close enough (in the range of a Wave turret) and if there is more than one target, the turret will stop firing its liquid beam for half a second and instead fire a circular arc (of liquid), hitting multiple targets. This will have a 1.5-2 seconds cooldown.
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