Depends also where your location is. We live in Makati so we're competing with salaries being offered by expats (which can get really high). Usually toddler/preschooler yaya taking care of 2 kids would be around 8k? but best to ask your potential nanny what her current salary is then increase it by X%. Rate would be lower in QC, San Juan, etc.
Jemima Hezekiah