Me personally, the main drain on relics is the continuous making of CC spells, which need Plank, Silk and Dust relics. Instead of focusing on those three tourneys to replenish those supplies, I have to work at all 9 tourneys to get the same amount of relics.
Now, that's me, and I'm not a typical. Your mileage may vary.
This is one of the changes in the Beta Announcement:
- Change in costs of magic spells - The current cost balancing of Enchantments leads to an uneven spending of relics. This is a disadvantage for all players, but it gets more and more critical the farer a player progresses in the game. A player e.g. might spend all his relics for ascended goods and then is stuck for a very long time on higher chapters. With changing the costs of spells, we hope to take away that problem.