SUCCESS!! Last night Kitty and a friend found the rarest of all gems...a random with a mic who was an adult, a nice guy, didn't swear, worked as a team, and had a Widow sniper.
We ran two Infiltrators (a 20 and a 16), a solider (a 12) and a Salarian engineer with the decoy. The solider was our close combat reinforcement, keeping the husks dead and being the meat shield for charging Banshees. The rest of us just team shot everything in sight. Took a try or two but then we had an awesome run!
I'd love to do it again, maybe tonight? Or tomorrow?
We ran Bronze afterwards just to cool off and Kitty pulled out her Vanguard. There was a a lot of agreement that the Vanguard and Solider were not useful classes on Silver or Gold, but our success made me wonder if we've just been thinking about those classes wrong. They're tanks built to do massage damage, but are usually played as rushing off into danger to go get slaughtered. When our solider hung back and became front line support we could offer him long range cover, and he was a mobile defensive block keeping the squishier teammates at bay.
With Reapers the biotic explosion potential of the Vanguard could be VERY useful...but only if the Vanguard doesn't run off into danger. I might level up my Vanguard and play conservative, see if this strat turns that class from a wildcard who's fun but not useful to a tactical close range strike when the enemy starts to overwhelm.
This sig available for rent.