Honestly Bozja was almost the perfect approach to me, I say almost because the requirements to do the exploratory content to progress hampered it along with somewhat unreasonable grinds towards the end. Basically having multiple pathways of about equal grind via several methods is ideal. Also please cut Crystal Tower out of any future relic grinds, there is far too much incentive already to do it so it doesn't need anymore. For example if I was to fix Manderville for this ideal:

Obtain 3 *insert item here*
Methods to get said item
1) Tomestones preferably at a slightly higher cost then EW had
2) Go run a full alliance raid series (Excluding CT)
3) Exchange current EX primal totems for one
4) Exchange expert crafts
5) Exchange currency from exploratory content

Several paths to the needed item to pick from. I personally hated only tomestones as a crafter as I need those for materials.