I would sync the mic first, that way it will all be there when you start moving bits around and cutting bits off- just make sure every time you cut a clip and move it you keep the off camera audio in sync!
A better alternative if your budget permits would perhaps be pluraleyes: https://www.singularsoftware.com/pluraleyes.html
Great bit of software syncs audio for you- great if you have lots of clips!
Hope that all helps a little 🙂
😀
Tom Morter-Laing
Freelance Editor,
Certified Apple Product Proffessional, 2010
http://www.depictproductions.co.uk
Sony Z5, with Rode NTG2.
iMac 27″ intel i7 2.93GHz, 12GB RAM, ATI HD5750 [1GB GDDR5], 2TB Int. SATA with 2TB External HDD; (FW800), with Elgato Turbo H264HD.