I was testing RNG because someone said here there is no RNG only skill issue and weapon/ammo drops dont effect play styles. So i basically made 20 runs in different difficulties. Same team composition, slight adjustments. After Ernie, i land to mainland at G6, ambush water carriers for the mine there and take the mine. Then clean all secret stashes for weapons between J8 and Fleatown, take the town and clean the map up to Refugee Camp, 10 of those runs i cleaned up to Poacher Camp. I stop there and take ammo count.
Right now only thing working for me is using 2 mercs for combat and saving everyone else for bigger fights. Basically stopped using MG because it is overkill and wastes bullets. Long story short, if marauders and mg gunners drop ammo, this works. If not, 2 mercs can fight as long as it is not a 2+ squad battle. I just dont like i am limited to certain play style(stealth sniper and CQC stealth). I have money(around 100K) i have weapons. Ah also not defending towns fixes ammo drought dramatically.