I guess it depends on how you're geared. I usually run in 4H as soon as I hit dirt and only use 4L for crawling rocks or really steep hill climbs.
The Rubi t-case with 5.13 gears is really low. 1st in 4L is only good up to around 3-5MPH and 4th till about 20 and that's pushing it. If I stay in 4L between obstacles, I'm usually locked in 3rd and stay out of D to avoid 1st altogether.
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Build Thread - Adventures of Fiona -
https://wayalife.com/showthread.php?t=47407