w1 - Engineer (1 fail)
w2 - Engineer (0 fails)
w3 - Demoknight (1 fail)
w4 - Heavy (16 fails)
w5 - Demoknight (4 fails)
w6 - Demoknight (1 fail)
w7 - Pyro (0 fails)

w4 was clearly the hardest wave this mission, went KGB heavy to free-crit the giant soldiers but still took a few tries between that, pyro and engie to complete that horrible wave. highly dependant on RNG for where the 1st pyros drop and whether or not they huddle around the giants instead of rushing at me (which is what i wanted). probably had around 35-40 deaths on w4 alone out of the 52 deaths total. Overall other than w4/w5, pretty easy - especially the last wave which is just a glorified victory lap.