Ah yes, the TDM multi-kill one is a bit of a pain. It doesn't seem to count when you make a double kill. I think you need to kill at least 3 people with only seconds in between.
This is what I also think it needs.
What are the odds of finding 3 people in a 8 people team in a perfectly compromised position for a multikill?
This is the type of mission for an accolade and not battlepass points
As much as I think Blackwell Fields is possibly the worst TDM map I've ever seen, if you manage to get even a single flank, a multi kill is almost guaranteed, due to it being absolutely tiny.
I might attempt that later.
I wonder if recon spec ops or assault will be the best stealthy flanker
