Get two warriors that have the sprint skill. Have one grab crystal, run to a shrine to place crystal, while the other warrior waits at the crystal spot, becuse it respawns exactly when you place at the shrine, so then he can sprint over to place at another shrine while the first warrior sprints back to the respawn spot. Have the rest of the team try to fight and defeat the mantles getting their crystal into the shrine, using slow, snares, hamstring, etc. type skill on their Crystal bearer helps a ton, and you should win without a hitch.
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