If its level 3 of bunker alfa I recommend 3 pistols 2 rifles 2 saws and 6 any other hand weapons yous the rifles on all giants yous pistols absolutely nessesry but for the most part yous hand weapons and the minimum of 12 bandages and 5 med kits

you could stack up the yellow and red tickets to get the easy guns and the armor and meds. or you could farm other spots like the chopper stops because they usually have a modded m16 or glock that you can save for later tho i would recommend that you go for the second floor because the third is kind of rough to get through. Also bring like 10 med kits and have as many m16s as you can carry. oh and also a bow might be handy in taking down the FG because theyre too slow to catch up to you

The only reason I like the 3rd floor is because it only has the Max of 3 frenzy giants I hate those things a lot they hit you want in your dead if they hit you twice when you go back over there you lose everything on your body But for the most part yes level to is a little easier If you don't mind bringing long guns like M14 or AK then I recommend the 4th floor I recommend 6 rifles 2 pistols and at least 20 meds Kits Or 60 bandages

Kill them all

I'd say to do level 2 because the specialist is there and he will help later in the game when you have more experience and weapons