Starting at level 17 build
Took longer than I anticipated. I'd say around 9-10 hours of playing. The main reason was at first I attempted to use Unidad re-spawning as the main instrument. Then tried later, as a change-of-pace, FT to Echo and ambush a convoy as well as leave the non-sniper at the tower alive so he could call reinforcements. Combining the two activities sped up the process quite a bit.
Resources collected as seen in the image were only road-side spawning and convoys. Left the province supply missions alone as well as once-only location resources. That also meant didn't collect any of the in-game skill points. The 30 available are from reaching level 17.
Used the 556xi/Dragon thru out and difficulty was on arcade. Still haven't decided on what to do exactly with this character, but it's at least built as a starting point that would involve using the skill tree to some extent, versus a no skill run.
The second image is the aftermath of the last convoy stop and resulting carnage.
Leveling fast to 17 to a degree was fun to do, but it also was a bit tedious.

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