Right now I'm just using the random air drop and calling in as many as possible to unlock them all. For me a match goes something like:
Backpack, sneaky perk thing, 10% movement speed perk
Spawn
Craft a blowdart gun and knife (and turn the knife into a spear asap). This is usually enough to put up a good fight at the early stages.
Hoard all of the FUNC I can. I put almost everything in the recycling machines that I find, as well as collecting FUNC canisters on the edges of the map.
If I see an unnaware, easy target I'll jump on them. Otherwise I avoid conflict initially.
Call in the airdrop as soon as possible. I find drops with the rifle and pistol to be the best so far.
Continue to circle the map, gathering FUNC for ammo and looking for a better melee weapon and med items.
Continue to pick off weak targets.
Eventually run to the middle and try to survive...
The odds are obviously against you every game, but this has helped me win a few times so far