That is not "A STRATEGY" it's a foolish endeavor of a desperate country that's in a dire desperate situation. A country ill prepared to face the coming of A.I. a country that's increasing it's extreme poverty, crimes, and political infighting.
If the PH was a rational country, lead by rational and pragmatic "leaders" they would not try to lead themselves and their country down to the road of primrose path. What's the urgency and suddenness of the PH action against it's dispute with China? What has changed on the ground in terms of physical infrastructure, patrols, and military presence from China in the region? Has it lessened or grown in frequency, size, and actions become more aggressive? Is there an actual existential threat emanating from China and it's supposed maligned activities in the region that hastened the dramatic aggressive and desperate tone and actions of the PH towards China?
The flare up and disputes on those waters are nothing new as it's been a consistent patterns between all claimants for many decades. The building of the artificial islands was not started by China - it was started by Vietnam if am not mistaken. But, due to China's heft, wealth, diplomatic, and military power it elected to build it's own islands to ensure and maximize its own claims against others. That's a rational action taken by a rationale actor and country.
It's only until the pivot to Asia as committed by then Pres. Obama that the PH started to really assert it's claims and pushed their luck against China. It was during the time of the now deceased PH former Pres. Noynoy Aquino Jr. that the dispute were internationalize at the behest and guidance from its saint patron and master, the U.S. Hence, the subject was then taken to UNCLOS/ITLOS that subsequently ruled in the PH favor. This issue became muted or mooted due to the UNEXPECTED rise AND ELECTION OF DUTERTE which place this supposed existential PH issue at the back burner of domestic priority and importance. Showing the inanity, not to mention THE ARROGANCE OF PHILIPPINE/FILIPINO ELITES/AMERICAN COMPRADORS AND YES, THEIR BLEEPING STUPIDITY that the majority of their people thought it was DRUGS, CRIME, CORRUPTION, POVERTY, JOB OPPORTUNITY were the PRESSING CONCERNS AND NEED of the country. The relationship between China and the PH improved and there were various discussion about resource sharing on those disputed islands. But Duterte could not get anywhere since he was essentially a caretaker president once his 1 and only term passed the 4 year mark. He was simply going to be waited out by the ENTRENCHED WESTERN/AMERICAN COMPROMISED
bureaucrats, POLITICIANS most of which have U.S. residency, U.S. passport holders, owned businesses in America, studied in America etc...Duterte provided the PH a once in a generational escape pod from the clutches of America, his country's elite apparatchik chose to disregard his insights as COWARDLY...LOL...
The PH have yet to exercise a degree of actual independence from America/West despite it's false declaration of "INDEPENDENCE" from Spain and the whole fakery of their supposed bravery. I am sorry to tell you dude, I have no bleeping respect for that country, none, whatsoever. If what the PH is doing is in your mind a strategy then by all means, in the word of OBAMA to then candidate Gov. Romney during their debate: "PLEASE PROCEED GOVERNOR."
