Urgent: Best site audit crawler?

My current crawling tool is absolutely killing me right now. It keeps crashing on a huge client site, and I've wasted hours trying to get a full crawl done.

I desperately need a reliable, robust crawling tool for comprehensive site audits. Something that can handle massive sites for urgent technical SEO audits without breaking a sweat.

What are your go-to recommendations for tools that just work? Help a brother out please...