Next delay and wake of fire

I read from some where that because of next delay, only 2 WOF is needed for a small group of monster, more traps will not do more damage. Is it true for LS too?|||Taken from the LS Trapper Guide v1.0:


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Trap Analysis

Lightning Sentry

Initial Delay – 33 frames

Firing Speed – 30 FPA

NextDelay – None

Shots – 10

Damage: ~1-11k

Wake of Fire

Initial Delay – 40 frames

Firing Speed – 17 FPA

NextDelay – 4 frames

Shots – 5

Damage: ~90-100

Fireblast

Firing Speed – 9 FPA

NextDelay – None

Damage: ~6k (1v1 Build) or ~1.5k (Team Build)