If Tier 15 is invincible, new players quit instantly. Your script should have natural predators: A dragon should still fear a swarm of 10 eagles using their "grab" ability in unison.
Even with a fantastic EvoWorld script, novice server owners make mistakes. Avoid these at all costs: evoworld script
If you are writing your own script, focus on undetectable automation. This means: If Tier 15 is invincible, new players quit instantly
Disclaimer: Using scripts violates the Terms of Service of EvoWorld. Proceed at your own risk. Disclaimer: Using scripts violates the Terms of Service
If you still wish to experiment, follow this step-by-step guide.