technical hiring process taking forever, how do we speed it up?

Our engineering hiring process is taking 8-10 weeks from first contact to offer. that's way too long and we're losing good candidates to faster moving companies.

current process: recruiter screen, hiring manager call, technical phone screen, take home project, onsite with 4 people, ceo final round

every person they meet with internally insists their step is essential. trying to figure out what we can actually cut without destroying our evaluation quality.

has anyone successfully shortened their technical hiring process? what did you cut and did quality suffer?