Make nether orb activations happen all at once

The activations already have to be fully completed before using an orb, and it would make it less likely to accidentally choose the wrong activation and mess up an orb. Just let the players choose how to distribute the activations in the menu, have a confirmation at the end. The ritual would cost 5000 power per activation, and the length would also be multiplied by the number of activations.

(You could even potentially show what the bonus would be in this case on the confirmation screen)