Crit troops or Mana troops?

I have all mana troops and all crit troops in my barracks. I have leveled the crit troops to high lvl, and I wander what to do, do i keep level the crit troops or i should star over with the mana troops.
Which one would be more efficient?

Any advices?
Thanks

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3 posts were merged into an existing topic: 4* troops - mana or crit?