After parking them on the back burner for a year, I have now worked through the Macrobinocular series which ends with the two Heroic 4's; Shroud's Last Stand and All the Pieces / Dark Design, and herein lies the problem...
As best as I can tell; these Heroics can only be obtained by following the chain as a single opportunity series. They are not available to others from consoles or NPC's and cannot be shared, not even with "Allow access to personal phases", and without having the mission logged for each player there is no way to recruit a multi-man team that can activate the platform to trigger the skiff chase and eventual Maki’Voro boss fight.
After several weeks of coming up empty on group recruitment for these Heroics, I'm forced to conclude that extremely few other players currently exist who have these Heroics ready to go, which makes me pretty much fscked.
There may be players who will chime in here on how they solo'ed every Heroic while mixing vodka martinis with their other hand, but is there any recourse for mortals such as myself to team for these Heroics ?