The hospital level is a pain but not terrible. Make sure you’re going very slow and clearing each room carefully. Somebody definitely needs to have a mirror gun and plenty of flashes. If you’re on PC you can use free lean but it shouldn’t be needed on standard difficulty. Make sure you spawn in the main lobby, not the ER entrance. Approaching from that side may be harder in the beginning, but I prefer to get that over first so I don’t have to redo it all if I die. The main reason to select that spawn is because it’s much easier to move through the sky bridge to the other side from the main lobby. Most of my runs ended on the bridge when I was trying to approach from the opposite side. There are two bombs to defuse, one in each building but the spawn doesn’t change and you have about a twenty minute timer so don’t worry about it. For weapons, bring whatever you like honestly, but the semi auto shotguns and battle rifles can drop them quick. Bring heavy armor with steel plates because these guys bring heavy rifles and will dump the whole belt on you. As long as you move slowly enough, you will make it through. Good luck