Harmony - Troop Symmetry

Supplies? As an option, "master of supplies."
The point is that supplies are essentially what takes up most of the time in such situations. Distribute goods among the caravans, distribute food from the caravans to the ships, and assign everyone, I think you should think in this direction.
"Accelerated march" is also not bad, but it evokes associations with the march of golems.

I would like to somehow connect it with dexterity, speed, possibly with thievery (very remotely)
this perk will be located in the scouting branch:
"scouting"->"silent pursuer"->"Snatch"
in addition, this branch will be completely or partially (up to "silent pursuer") one of the combat branches of the tactical enchantment "Coordination" (as in Heroes 7, it gives a second strike)

Added 1 minute ago

"Capture," "quick grab"?

Oh! Already closer!!!