[enjchanter]

When I was leveling I just used rune 3 until I got rune 5 honestly.
Mostly for the cost reasons. You use so many runes while soloing that it's not uncommon to use up to a stack in a session.

My advice/what I did : use rune 3 and meanwhile pick an arbitrary amount of holding plat (200p in my case) and any excess I always threw it in the bank and via that + chunking some items to ec flippers otw to the bank I amassed a rather lard peridot fund and now it's easy to carry 10 stacks of dots at all times.

Once you can afford to use rune 5 , you should definitely switch though , it's a huge difference (soaking harm touchs vs mobs smashing through them)