Any update on transfer experiences at Manila lately?

I am planning a transfer from Cebu Pacific (T3) to Cathay Pacific (T1) and would like to know best options, typical time, busy periods etc.

Chances are our Cebu flight will arrive at MNL around 3:30p and our CX flight departs MNL at 5:50. That essentially means we need to be at the check-in counter by 5pm. Feasible?