I would not risk a liveaboard in August in PHL - weather maybe beautiful but typhoons are common and unpredictable and then trip is cancelled.sadly there is not much big stuff to see in phil - threshers in Malapascua are the only option really but a very good one. With Eco preference you mention Oslob is to be avoided. but there is plenty of superb macro and wrecks in phl.good combo is to fly to Cebu and out and combine malapascua and moalboal. i dived with evolution on two separate trips in malapascua and they are superb. moalboal has sardines and very good macro. If you have more time and weather is good can add on Dumaguete - transfer by bus+boat from moal boal. can then fly out from Dumaguete. excellent muck and trips to Apo island (not to be confused with Apo reef). Apo island has beautiful corals, macro and fish - but no big stuff really. we stayed at talata - excellent small resort with divine food and closest to apo island - just across.for wrecks - coron is fantastic - fly to coron, but better to stay in busuanga bay not in coron town - i stayed in al faro and the resort is wonderful if you dont mind the climb up the stairs. d'divers is the dive shop for resorts there and is an amazingly professional establishment. wrecks are 10 min boat ride. Puerto Galera (Sabang) and Anilao are easy commute from Manila both with superb macro. For me underwater in both is very similar key differences are on the surface side. in Anilao you are locked in your resort bc it is hard to get from place to place bc of topography; diving charging system is that you pay for a boat and a dive guide so it is good for a group but if 1-2 travellers gets expensive. at the same time it is land transfer to MNL so even if weather turns bad you will not have an issue getting back to MNl (say catching a flight). PG has a town vibe, more options for food and places to stay. In calm sea is is only a 40min boat ride from batangas pier - so actually total travel time on good weather day from manila to Anilao or Sabang is about the same. but if weather turns boats stop running. My advice is check if the weather is clear and no storms or typhoons are brewing in the Pacific, then head out to Sabang, otherwise Anilao. frog fish, flamboyant cuttlefish, octopus, all sorts of nudies and various cool critters are very much in both places and DMs are phenomenal at finding them.When is Sabang best to stay in one of the Lagunas and not Sabang itself - all very near 10min walk. We usually stay and dive with Blue Ribbon - small resort, highly professional and great instructors and DMs and eco friendly. Good food and very relaxed atmosphere.the big plus is that it is a quiet season now, in many places you will likely have a boat and guide to yourselves and pick and choose where to dive. Availability is not an issue and most of the time weather is fine with just a bit of rain in the afternoon. Good luck!