Efficient training is never just a 120/200m problem.
Pouches get 500% durability from the spell.
Giant pouches normal degrade in 12 uses, this makes it 60 uses.
Even if you say repairing only takes you 10 seconds thats saving you 40 seconds per 60 trips and in terms of making xp/large amounts of runes we are talking thousands of trips.
600 trips, 400 seconds saved 6.6mins
6000 trips 4000 seconds 1hr 6minutes
From 77 (blood rune level) to 99 you need to make around 1.2m bloods (not accounting for the new abyss xp boost and assuming master rc and clana ava 3% boost)
At maximum reasonable efficiency you can make 61 runes worth of xp in 1 run (thats 30 for the 4 standard pouches, 7 for a familiar and 24 invetory slots)
So that's 19,672 runs for 77 to 99
That's 328 lots of 60 trips.
Resulting in 13,120 seconds saved aka 219 minutes aka 3.6 hours.
And that is *just* for doing 77 to 99.
It is a significant time saver, which in turn boosts gp or xp per hr. Of course it does suffer from whether it is efficient to get vs just spending the time rcing, but thats my point in the first place. Livid farm has useful rewards its the process of unlocking them that is the issue.
As for 5 - lol thousands of people don't do herb runs without trollheim, at least not those with access to it. Every single question on fansites about herb runs and every single guide worth its salt mentions trollheim, you are very much in a minority to not be using trollheim. I mean profit/xp get 101 is to use as many patches as possible for your herb runs and thats BEFORE you factor in that trollheim can never ever ever die making it a holy grail of profit saving on bad runs.