What exactly are you trying to say here? that it's hard to get enough Embers (Relic ISO) to level up the Runes on your Relics. If you have the Sigil you get a lot of Ember. Other than that your best best is reaching Milestone 4 on the 22 Hour Events. Milestone 2 on the 7 Hour Events provides some small amounts of Ember as well. Duping Relics is definitely a hard way to get enough Ember but with time that method will become easier.
The way that relics are displayed when they are ready to level up and dump embers isn't the same way that champs are displayed when they are ready to level up and dump ISO. What exactly are you trying to say here? that it's hard to get enough Embers (Relic ISO) to level up the Runes on your Relics. If you have the Sigil you get a lot of Ember. Other than that your best best is reaching Milestone 4 on the 22 Hour Events. Milestone 2 on the 7 Hour Events provides some small amounts of Ember as well. Duping Relics is definitely a hard way to get enough Ember but with time that method will become easier. Too much ember, not enough relics.