Except for two sneaky tricks.
Let's say you're targeting a Golden Abyss. Note that the top few Chests will award Runes as well as AW Tokens. One of the neat features of Net0 is that if you claim a top chest folks will leave you there, rather than bumping you.
Trick #1: If you contribute anything OTHER THAN Runes to a top chest, and don't get bumped, you'll gain a few Runes, of that type, when the chest is awarded.
Trick#2: Select some Ancient Wonders that you DO NOT want to use any time soon, and use them to generate Broken Shards. Your yield will be right at 50%, so for every 20 Runes that you DON'T WANT anyway (Hardly anybody ever builds Enar for instance) you'll fill up ONE Broken Rune bar, which can be used on ANY of your other AWs. This approach can be frustrating for the first few slots in the Rune Wheel, but as the Rune Wheel fills up, your odds of getting a Broken Shard get higher and higher because the randomly selected slot was already full. When the unwanted Rune Wheel is full, build the AW and then immediately tear it down. You don't even have to wait for the Build Timer. Rinse and Repeat.