Hi there,
Yes, I will do your speed optimization task with perfection. Every point I will fix and score up to 93%+ surely with leverage caching, expiry headers and image optimizations.
No need to use more plugins to speed up. It just a way and find out actual issues and fix it.
Can you share me your website URL to check the current score and points which is responsible for low score and speed?
Let me know your concern and reply me to move forward to get the job done asap.
Thank you.