Anyone here using dynamic call routing for pay-per-call campaigns?

I’m trying to fine-tune how my calls move between different pay-per-call campaigns, especially when traffic spikes or buyers change their caps. Phonexa helps with call tracking, but I’m still looking for a smoother setup that handles automatic lead distribution and balances routing without wasting calls. Has anyone built a system that adjusts in real time and keeps ROI stable across multiple niches?