Hello BBJ
I'm sure you know where to go and where not to go as you've been travelling there numerous times.
Many places are not safe. It's a risk. Personally I avoid Cotabato and surrounding areas as I've had issues.
Davao City is OK the rest of the East Coast is uneasy for me although I do travel to Tagum, Mati etc
Around Cotabato, Bukidnon, Surigao etc I'd be very very careful but as long as you're experienced you should be OK
Let me know exactly where you will go