Herb runs have an average of between 2-4 million per hour. The drawback that you only play for about 6 minutes per two hours or runescape buy gold so. It's a great way to take a break from whatever you're doing or learning an ability, or to begin/end your session of playing RS. If you value time at over 4m/hour don't farm Herbs.
The aim of an Herb runs is travel in the fastest time possible to all the Herb patches that are at your disposal, pick herbs to sell for cash and then plant the seeds to reap later. With the most efficient equipment and using all five patches you can complete a run in under 6 minutes beginning the timer from the moment you teleport to Trollheim and finishing after all patches are harvested and replanted, and all tools kept in storage.
Ardougne Cloak 4 is a good replacement. Ardougne Cloak 4 is able to be substituted with the Ardougne Cloak 2 or 3 However, these Cloaks are able to only use the Farm patch teleport each day. Other than that, you can utilize Teleport towards North Ardougne (must unlock at Livid Farm) however this will take you a considerable distance away from the Farming patches. Teleport to Catherby can be replaced with a Teleport to Camelot or a Camelot tab. The Trollheim Patch cannot be diseased/die. Magic Secateurs are optional but increase Herb yield.
Currently I'm unsure whether it is worth the effort to use Juju Farming tinctures - even though they're beneficial however, they require a prolonged time for gathering ingredients for. However, they do provide Torstol seeds an option for making money, as they offer on average more money than Snapdragon even for patches other that the Trollheim patch.
Herb-based runs yield an average return of 2-4 million per hour, but with the downside that you're able to complete it for 6 minutes each two hours, or so. It is a good way to take a break from what you're working on for example, to test an ability, or to kick off or finish your session of RS. If you're looking for a rate of over 4m per hour and you are not farming, don't. Herbs.
The intention behind Herb runs is to Herb Run is travel as quickly as possible to every Herb patches you have at your disposal, pick herbs to market for cash and then replant the seeds for later harvest. If you have the top equipment and using all five patches it is possible to finish the run in just under 6 minutes in total, the timer beginning from the moment you teleport to Trollheim and finishing after the entire patch is harvested and put back in the ground, and all the equipment is are stored.
There is no limit to the number of times you can use it. Ardougne Cloak 4 can be substituted with the Ardougne Cloak 2 or 3, but these Cloaks can only use the Farm patch only once per day. You can also use Teleport in North Ardougne (must unlock at Livid Farm) however that old school runescape gp for sale places you a good distance away from the patch for farming.