I wish I had 3 other decent players who atleast know what they are doing. It’s so easy to make it past level 50+ if everyone is on the same page.
RPD/MG42/Sniper the 3 guns you will need. Dont buy guns until you buy RPD. Point farm until round 20 with the RPD Until You fully upgrade sniper and have 100k to fully upgrade MG42. Make sure you get all your perks before upgrading weapons. Leave the staircase closed. 2 Trap Masters, 1 Sentry and 1 Medic would be the perfect squad or replace sentry with poltergeist so everyone moves faster.