Which should come first - Rejuvapen or TCA peel? How long in between?

My regular aesthetician tells me tca peels are "a thing of the past" and that I should have rejuvapen done. My plastic surgeon tells me a tca peel will work wonders but they can't do it on my neck, which is my problem area. My aesthetician will do pen on face, neck and chest. I'd like to do both. I'm 34 with very aged skin due to sun exposure and hormones. I have dull saggy skin, especially on neck and large pores and brown spots. I want to look and feel 34 instead of 64. Suggestions please?